docs(tools/cloudgda): update cloud gda datasource references note (#2326)

## Description

Update the GDA source document to clarify that only `AlloyDbReference`,
`SpannerReference`, and `CloudSqlReference` are supported.

## PR Checklist

> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:

- [x] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
  before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
- [x] Appropriate docs were updated (if necessary)
- [x] Make sure to add `!` if this involve a breaking change

🛠️ Fixes #2324

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

cmd/root.go

@@ -98,6 +98,7 @@ import (
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsql/cloudsqlgetinstances"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsql/cloudsqllistdatabases"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsql/cloudsqllistinstances"
+	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsql/cloudsqlrestorebackup"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsql/cloudsqlwaitforoperation"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsqlmssql/cloudsqlmssqlcreateinstance"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsqlmysql/cloudsqlmysqlcreateinstance"

cmd/root_test.go

@@ -1493,7 +1493,7 @@ func TestPrebuiltTools(t *testing.T) {
 			wantToolset: server.ToolsetConfigs{
 				"cloud_sql_postgres_admin_tools": tools.ToolsetConfig{
 					Name:      "cloud_sql_postgres_admin_tools",
-					ToolNames: []string{"create_instance", "get_instance", "list_instances", "create_database", "list_databases", "create_user", "wait_for_operation", "postgres_upgrade_precheck", "clone_instance", "create_backup"},
+					ToolNames: []string{"create_instance", "get_instance", "list_instances", "create_database", "list_databases", "create_user", "wait_for_operation", "postgres_upgrade_precheck", "clone_instance", "create_backup", "restore_backup"},
 				},
 			},
 		},
@@ -1503,7 +1503,7 @@ func TestPrebuiltTools(t *testing.T) {
 			wantToolset: server.ToolsetConfigs{
 				"cloud_sql_mysql_admin_tools": tools.ToolsetConfig{
 					Name:      "cloud_sql_mysql_admin_tools",
-					ToolNames: []string{"create_instance", "get_instance", "list_instances", "create_database", "list_databases", "create_user", "wait_for_operation", "clone_instance", "create_backup"},
+					ToolNames: []string{"create_instance", "get_instance", "list_instances", "create_database", "list_databases", "create_user", "wait_for_operation", "clone_instance", "create_backup", "restore_backup"},
 				},
 			},
 		},
@@ -1513,7 +1513,7 @@ func TestPrebuiltTools(t *testing.T) {
 			wantToolset: server.ToolsetConfigs{
 				"cloud_sql_mssql_admin_tools": tools.ToolsetConfig{
 					Name:      "cloud_sql_mssql_admin_tools",
-					ToolNames: []string{"create_instance", "get_instance", "list_instances", "create_database", "list_databases", "create_user", "wait_for_operation", "clone_instance", "create_backup"},
+					ToolNames: []string{"create_instance", "get_instance", "list_instances", "create_database", "list_databases", "create_user", "wait_for_operation", "clone_instance", "create_backup", "restore_backup"},
 				},
 			},
 		},

docs/en/how-to/connect-ide/cloud_sql_mssql_admin_mcp.md

@@ -54,6 +54,7 @@ instance, database and users:
         * `create_instance`
         * `create_user`
         * `clone_instance`
+        * `restore_backup`
 
 ## Install MCP Toolbox
 
@@ -301,6 +302,7 @@ instances and interacting with your database:
 * **wait_for_operation**: Waits for a Cloud SQL operation to complete.
 * **clone_instance**: Creates a clone of an existing Cloud SQL for SQL Server instance.
 * **create_backup**: Creates a backup on a Cloud SQL instance.
+* **restore_backup**: Restores a backup of a Cloud SQL instance.
 
 {{< notice note >}}
 Prebuilt tools are pre-1.0, so expect some tool changes between versions. LLMs

docs/en/how-to/connect-ide/cloud_sql_mysql_admin_mcp.md

@@ -54,6 +54,7 @@ database and users:
         * `create_instance`
         * `create_user`
         * `clone_instance`
+        * `restore_backup`
 
 ## Install MCP Toolbox
 
@@ -301,6 +302,7 @@ instances and interacting with your database:
 * **wait_for_operation**: Waits for a Cloud SQL operation to complete.
 * **clone_instance**: Creates a clone of an existing Cloud SQL for MySQL instance.
 * **create_backup**: Creates a backup on a Cloud SQL instance.
+* **restore_backup**: Restores a backup of a Cloud SQL instance.
 
 {{< notice note >}}
 Prebuilt tools are pre-1.0, so expect some tool changes between versions. LLMs

docs/en/how-to/connect-ide/cloud_sql_pg_admin_mcp.md

@@ -54,6 +54,7 @@ instance, database and users:
         * `create_instance`
         * `create_user`
         * `clone_instance`
+        * `restore_backup`
 
 ## Install MCP Toolbox
 
@@ -301,6 +302,7 @@ instances and interacting with your database:
 * **wait_for_operation**: Waits for a Cloud SQL operation to complete.
 * **clone_instance**: Creates a clone of an existing Cloud SQL for PostgreSQL instance.
 * **create_backup**: Creates a backup on a Cloud SQL instance.
+* **restore_backup**: Restores a backup of a Cloud SQL instance.
 
 {{< notice note >}}
 Prebuilt tools are pre-1.0, so expect some tool changes between versions. LLMs

docs/en/how-to/deploy_toolbox.md

@@ -207,6 +207,7 @@ You can connect to Toolbox Cloud Run instances directly through the SDK.
 {{< tab header="Python" lang="python" >}}
 import asyncio
 from toolbox_core import ToolboxClient, auth_methods
+from toolbox_core.protocol import Protocol
 
 # Replace with the Cloud Run service URL generated in the previous step
 URL = "https://cloud-run-url.app"
@@ -217,6 +218,7 @@ async def main():
   async with ToolboxClient(
       URL,
       client_headers={"Authorization": auth_token_provider},
+      protocol=Protocol.TOOLBOX,
   ) as toolbox:
     toolset = await toolbox.load_toolset()
     # ...
@@ -281,3 +283,5 @@ contain the specific error message needed to diagnose the problem.
   Manager, it means the Toolbox service account is missing permissions.
   - Ensure the `toolbox-identity` service account has the **Secret Manager
       Secret Accessor** (`roles/secretmanager.secretAccessor`) IAM role.
+
+- **Cloud Run Connections via IAP:** Currently we do not support Cloud Run connections via [IAP](https://docs.cloud.google.com/iap/docs/concepts-overview). Please disable IAP if you are using it.

docs/en/reference/prebuilt-tools.md

@@ -194,6 +194,7 @@ See [Usage Examples](../reference/cli.md#examples).
         * `create_instance`
         * `create_user`
         * `clone_instance`
+        * `restore_backup`
 
 *   **Tools:**
     *   `create_instance`: Creates a new Cloud SQL for MySQL instance.
@@ -205,6 +206,7 @@ See [Usage Examples](../reference/cli.md#examples).
     *   `wait_for_operation`: Waits for a Cloud SQL operation to complete.
     *   `clone_instance`: Creates a clone for an existing Cloud SQL for MySQL instance.
     *   `create_backup`: Creates a backup on a Cloud SQL instance.
+    *   `restore_backup`: Restores a backup of a Cloud SQL instance.
 
 ## Cloud SQL for PostgreSQL
 
@@ -284,6 +286,7 @@ See [Usage Examples](../reference/cli.md#examples).
         * `create_instance`
         * `create_user`
         * `clone_instance`
+        * `restore_backup`
 *   **Tools:**
     *   `create_instance`: Creates a new Cloud SQL for PostgreSQL instance.
     *   `get_instance`: Gets information about a Cloud SQL instance.
@@ -294,6 +297,7 @@ See [Usage Examples](../reference/cli.md#examples).
     *   `wait_for_operation`: Waits for a Cloud SQL operation to complete.
     *   `clone_instance`: Creates a clone for an existing Cloud SQL for PostgreSQL instance.
     *   `create_backup`: Creates a backup on a Cloud SQL instance.
+    *   `restore_backup`: Restores a backup of a Cloud SQL instance.
 
 ## Cloud SQL for SQL Server
 
@@ -347,6 +351,7 @@ See [Usage Examples](../reference/cli.md#examples).
         * `create_instance`
         * `create_user`
         * `clone_instance`
+        * `restore_backup`
 *   **Tools:**
     *   `create_instance`: Creates a new Cloud SQL for SQL Server instance.
     *   `get_instance`: Gets information about a Cloud SQL instance.
@@ -357,6 +362,7 @@ See [Usage Examples](../reference/cli.md#examples).
     *   `wait_for_operation`: Waits for a Cloud SQL operation to complete.
     *   `clone_instance`: Creates a clone for an existing Cloud SQL for SQL Server instance.
     *   `create_backup`: Creates a backup on a Cloud SQL instance.
+    *   `restore_backup`: Restores a backup of a Cloud SQL instance.
 
 ## Dataplex
 

docs/en/resources/tools/cloudgda/cloud-gda-query.md

@@ -12,6 +12,9 @@ aliases:
 
 The `cloud-gemini-data-analytics-query` tool allows you to send natural language questions to the Gemini Data Analytics API and receive structured responses containing SQL queries, natural language answers, and explanations. For details on defining data agent context for database data sources, see the official [documentation](https://docs.cloud.google.com/gemini/docs/conversational-analytics-api/data-agent-authored-context-databases).
 
+> [!NOTE]
+> Only `alloydb`, `spannerReference`, and `cloudSqlReference` are supported as [datasource references](https://clouddocs.devsite.corp.google.com/gemini/docs/conversational-analytics-api/reference/rest/v1beta/projects.locations.dataAgents#DatasourceReferences).
+
 ## Example
 
 ```yaml

docs/en/resources/tools/cloudsql/cloudsqlrestorebackup.md

@@ -0,0 +1,53 @@
+---
+title: cloud-sql-restore-backup
+type: docs
+weight: 10
+description: "Restores a backup of a Cloud SQL instance."
+---
+
+The `cloud-sql-restore-backup` tool restores a backup on a Cloud SQL instance using the Cloud SQL Admin API.
+
+{{< notice info dd>}}
+This tool uses a `source` of kind `cloud-sql-admin`.
+{{< /notice >}}
+
+## Examples
+
+Basic backup restore
+
+```yaml
+tools:
+  backup-restore-basic:
+    kind: cloud-sql-restore-backup
+    source: cloud-sql-admin-source
+    description: "Restores a backup onto the given Cloud SQL instance."
+```
+
+## Reference
+
+### Tool Configuration
+| **field**      | **type** | **required** | **description**                                  |
+| -------------- | :------: | :----------: | ------------------------------------------------ |
+| kind           | string   | true         | Must be "cloud-sql-restore-backup".              |
+| source         | string   | true         | The name of the `cloud-sql-admin` source to use. |
+| description    | string   | false        | A description of the tool.                       |
+
+### Tool Inputs
+
+| **parameter**     | **type** | **required** | **description**                                                              |
+| ------------------| :------: | :----------: | -----------------------------------------------------------------------------|
+| target_project    | string   | true         | The project ID of the instance to restore the backup onto.                   |
+| target_instance   | string   | true         | The instance to restore the backup onto. Does not include the project ID.    |
+| backup_id         | string   | true         | The identifier of the backup being restored.                                 |
+| source_project    | string   | false        | (Optional) The project ID of the instance that the backup belongs to.        |
+| source_instance   | string   | false        | (Optional) Cloud SQL instance ID of the instance that the backup belongs to. |
+
+## Usage Notes
+
+- The `backup_id` field can be a BackupRun ID (which will be an int64), backup name, or BackupDR backup name.
+- If the `backup_id` field contains a BackupRun ID (i.e. an int64), the optional fields `source_project` and `source_instance` must also be provided.
+
+## See Also
+- [Cloud SQL Admin API documentation](https://cloud.google.com/sql/docs/mysql/admin-api)
+- [Toolbox Cloud SQL tools documentation](../cloudsql)
+- [Cloud SQL Restore API documentation](https://cloud.google.com/sql/docs/mysql/backup-recovery/restoring)

docs/en/resources/tools/redis/redis.md

@@ -30,6 +30,10 @@ following config for example:
     - name: userNames
       type: array
       description: The user names to be set.  
+      items:
+          name: userName # the item name doesn't matter but it has to exist
+          type: string 
+          description: username
 ```
 
 If the input is an array of strings `["Alice", "Sid", "Bob"]`,  The final command

internal/prebuiltconfigs/tools/cloud-sql-mssql-admin.yaml

@@ -46,6 +46,9 @@ tools:
   create_backup:
     kind: cloud-sql-create-backup
     source: cloud-sql-admin-source
+  restore_backup:
+    kind: cloud-sql-restore-backup
+    source: cloud-sql-admin-source
 
 toolsets:
   cloud_sql_mssql_admin_tools:
@@ -58,3 +61,4 @@ toolsets:
     - wait_for_operation
     - clone_instance
     - create_backup
+    - restore_backup

internal/prebuiltconfigs/tools/cloud-sql-mysql-admin.yaml

@@ -46,6 +46,9 @@ tools:
   create_backup:
     kind: cloud-sql-create-backup
     source: cloud-sql-admin-source
+  restore_backup:
+    kind: cloud-sql-restore-backup
+    source: cloud-sql-admin-source
 
 toolsets:
   cloud_sql_mysql_admin_tools:
@@ -58,3 +61,4 @@ toolsets:
     - wait_for_operation
     - clone_instance
     - create_backup
+    - restore_backup

internal/prebuiltconfigs/tools/cloud-sql-postgres-admin.yaml

@@ -49,6 +49,9 @@ tools:
   create_backup:
     kind: cloud-sql-create-backup
     source: cloud-sql-admin-source
+  restore_backup:
+    kind: cloud-sql-restore-backup
+    source: cloud-sql-admin-source
 
 toolsets:
   cloud_sql_postgres_admin_tools:
@@ -62,3 +65,4 @@ toolsets:
     - postgres_upgrade_precheck
     - clone_instance
     - create_backup
+    - restore_backup

internal/sources/cloudsqladmin/cloud_sql_admin.go

@@ -19,6 +19,7 @@ import (
 	"fmt"
 	"net/http"
 	"regexp"
+	"strconv"
 	"strings"
 	"text/template"
 	"time"
@@ -36,7 +37,10 @@ import (
 
 const SourceKind string = "cloud-sql-admin"
 
-var targetLinkRegex = regexp.MustCompile(`/projects/([^/]+)/instances/([^/]+)/databases/([^/]+)`)
+var (
+	targetLinkRegex = regexp.MustCompile(`/projects/([^/]+)/instances/([^/]+)/databases/([^/]+)`)
+	backupDRRegex   = regexp.MustCompile(`^projects/([^/]+)/locations/([^/]+)/backupVaults/([^/]+)/dataSources/([^/]+)/backups/([^/]+)$`)
+)
 
 // validate interface
 var _ sources.SourceConfig = Config{}
@@ -374,6 +378,48 @@ func (s *Source) InsertBackupRun(ctx context.Context, project, instance, locatio
 	return resp, nil
 }
 
+func (s *Source) RestoreBackup(ctx context.Context, targetProject, targetInstance, sourceProject, sourceInstance, backupID, accessToken string) (any, error) {
+	request := &sqladmin.InstancesRestoreBackupRequest{}
+
+	// There are 3 scenarios for the backup identifier:
+	// 1. The identifier is an int64 containing the timestamp of the BackupRun.
+	//    This is used to restore standard backups, and the RestoreBackupContext
+	//    field should be populated with the backup ID and source instance info.
+	// 2. The identifier is a string of the format
+	//    'projects/{project-id}/locations/{location}/backupVaults/{backupvault}/dataSources/{datasource}/backups/{backup-uid}'.
+	//    This is used to restore BackupDR backups, and the BackupdrBackup field
+	//    should be populated.
+	// 3. The identifer is a string of the format
+	//    'projects/{project-id}/backups/{backup-uid}'. In this case, the Backup
+	//    field should be populated.
+	if backupRunID, err := strconv.ParseInt(backupID, 10, 64); err == nil {
+		if sourceProject == "" || targetInstance == "" {
+			return nil, fmt.Errorf("source project and instance are required when restoring via backup ID")
+		}
+		request.RestoreBackupContext = &sqladmin.RestoreBackupContext{
+			Project:     sourceProject,
+			InstanceId:  sourceInstance,
+			BackupRunId: backupRunID,
+		}
+	} else if backupDRRegex.MatchString(backupID) {
+		request.BackupdrBackup = backupID
+	} else {
+		request.Backup = backupID
+	}
+
+	service, err := s.GetService(ctx, string(accessToken))
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := service.Instances.RestoreBackup(targetProject, targetInstance, request).Do()
+	if err != nil {
+		return nil, fmt.Errorf("error restoring backup: %w", err)
+	}
+
+	return resp, nil
+}
+
 func generateCloudSQLConnectionMessage(ctx context.Context, source *Source, logger log.Logger, opResponse map[string]any, connectionMessageTemplate string) (string, bool) {
 	operationType, ok := opResponse["operationType"].(string)
 	if !ok || operationType != "CREATE_DATABASE" {

internal/tools/cloudsql/cloudsqlrestorebackup/cloudsqlrestorebackup.go

@@ -0,0 +1,183 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cloudsqlrestorebackup
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/goccy/go-yaml"
+	"github.com/googleapis/genai-toolbox/internal/embeddingmodels"
+	"github.com/googleapis/genai-toolbox/internal/sources"
+	"github.com/googleapis/genai-toolbox/internal/tools"
+	"github.com/googleapis/genai-toolbox/internal/util/parameters"
+	"google.golang.org/api/sqladmin/v1"
+)
+
+const kind string = "cloud-sql-restore-backup"
+
+var _ tools.ToolConfig = Config{}
+
+type compatibleSource interface {
+	GetDefaultProject() string
+	GetService(context.Context, string) (*sqladmin.Service, error)
+	UseClientAuthorization() bool
+	RestoreBackup(ctx context.Context, targetProject, targetInstance, sourceProject, sourceInstance, backupID, accessToken string) (any, error)
+}
+
+// Config defines the configuration for the restore-backup tool.
+type Config struct {
+	Name         string   `yaml:"name" validate:"required"`
+	Kind         string   `yaml:"kind" validate:"required"`
+	Description  string   `yaml:"description"`
+	Source       string   `yaml:"source" validate:"required"`
+	AuthRequired []string `yaml:"authRequired"`
+}
+
+func init() {
+	if !tools.Register(kind, newConfig) {
+		panic(fmt.Sprintf("tool kind %q already registered", kind))
+	}
+}
+
+func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) {
+	actual := Config{Name: name}
+	if err := decoder.DecodeContext(ctx, &actual); err != nil {
+		return nil, err
+	}
+	return actual, nil
+}
+
+// ToolConfigKind returns the kind of the tool.
+func (cfg Config) ToolConfigKind() string {
+	return kind
+}
+
+// Initialize initializes the tool from the configuration.
+func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) {
+	rawS, ok := srcs[cfg.Source]
+	if !ok {
+		return nil, fmt.Errorf("no source named %q configured", cfg.Source)
+	}
+	s, ok := rawS.(compatibleSource)
+	if !ok {
+		return nil, fmt.Errorf("invalid source for %q tool: source %q not compatible", kind, cfg.Source)
+	}
+
+	project := s.GetDefaultProject()
+	var targetProjectParam parameters.Parameter
+	if project != "" {
+		targetProjectParam = parameters.NewStringParameterWithDefault("target_project", project, "The GCP project ID. This is pre-configured; do not ask for it unless the user explicitly provides a different one.")
+	} else {
+		targetProjectParam = parameters.NewStringParameter("target_project", "The project ID")
+	}
+
+	allParameters := parameters.Parameters{
+		targetProjectParam,
+		parameters.NewStringParameter("target_instance", "Cloud SQL instance ID of the target instance. This does not include the project ID."),
+		parameters.NewStringParameter("backup_id", "Identifier of the backup being restored. Can be a BackupRun ID, backup name, or BackupDR backup name. Use the full backup ID as provided, do not try to parse it"),
+		parameters.NewStringParameterWithRequired("source_project", "GCP project ID of the instance that the backup belongs to. Only required if the backup_id is a BackupRun ID.", false),
+		parameters.NewStringParameterWithRequired("source_instance", "Cloud SQL instance ID of the instance that the backup belongs to. Only required if the backup_id is a BackupRun ID.", false),
+	}
+	paramManifest := allParameters.Manifest()
+
+	description := cfg.Description
+	if description == "" {
+		description = "Restores a backup on a Cloud SQL instance."
+	}
+
+	mcpManifest := tools.GetMcpManifest(cfg.Name, description, cfg.AuthRequired, allParameters, nil)
+
+	return Tool{
+		Config:      cfg,
+		AllParams:   allParameters,
+		manifest:    tools.Manifest{Description: description, Parameters: paramManifest, AuthRequired: cfg.AuthRequired},
+		mcpManifest: mcpManifest,
+	}, nil
+}
+
+// Tool represents the restore-backup tool.
+type Tool struct {
+	Config
+	AllParams   parameters.Parameters `yaml:"allParams"`
+	manifest    tools.Manifest
+	mcpManifest tools.McpManifest
+}
+
+func (t Tool) ToConfig() tools.ToolConfig {
+	return t.Config
+}
+
+func (t Tool) Invoke(ctx context.Context, resourceMgr tools.SourceProvider, params parameters.ParamValues, accessToken tools.AccessToken) (any, error) {
+	source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind)
+	if err != nil {
+		return nil, err
+	}
+	paramsMap := params.AsMap()
+
+	targetProject, ok := paramsMap["target_project"].(string)
+	if !ok {
+		return nil, fmt.Errorf("error casting 'target_project' parameter: %v", paramsMap["target_project"])
+	}
+	targetInstance, ok := paramsMap["target_instance"].(string)
+	if !ok {
+		return nil, fmt.Errorf("error casting 'target_instance' parameter: %v", paramsMap["target_instance"])
+	}
+	backupID, ok := paramsMap["backup_id"].(string)
+	if !ok {
+		return nil, fmt.Errorf("error casting 'backup_id' parameter: %v", paramsMap["backup_id"])
+	}
+	sourceProject, _ := paramsMap["source_project"].(string)
+	sourceInstance, _ := paramsMap["source_instance"].(string)
+
+	return source.RestoreBackup(ctx, targetProject, targetInstance, sourceProject, sourceInstance, backupID, string(accessToken))
+}
+
+// ParseParams parses the parameters for the tool.
+func (t Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (parameters.ParamValues, error) {
+	return parameters.ParseParams(t.AllParams, data, claims)
+}
+
+func (t Tool) EmbedParams(ctx context.Context, paramValues parameters.ParamValues, embeddingModelsMap map[string]embeddingmodels.EmbeddingModel) (parameters.ParamValues, error) {
+	return parameters.EmbedParams(ctx, t.AllParams, paramValues, embeddingModelsMap, nil)
+}
+
+// Manifest returns the tool's manifest.
+func (t Tool) Manifest() tools.Manifest {
+	return t.manifest
+}
+
+// McpManifest returns the tool's MCP manifest.
+func (t Tool) McpManifest() tools.McpManifest {
+	return t.mcpManifest
+}
+
+// Authorized checks if the tool is authorized.
+func (t Tool) Authorized(verifiedAuthServices []string) bool {
+	return true
+}
+
+func (t Tool) RequiresClientAuthorization(resourceMgr tools.SourceProvider) (bool, error) {
+	source, err := tools.GetCompatibleSource[compatibleSource](resourceMgr, t.Source, t.Name, t.Kind)
+	if err != nil {
+		return false, err
+	}
+
+	return source.UseClientAuthorization(), nil
+}
+
+func (t Tool) GetAuthTokenHeaderName(resourceMgr tools.SourceProvider) (string, error) {
+	return "Authorization", nil
+}

internal/tools/cloudsql/cloudsqlrestorebackup/cloudsqlrestorebackup_test.go

@@ -0,0 +1,71 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cloudsqlrestorebackup_test
+
+import (
+	"testing"
+
+	yaml "github.com/goccy/go-yaml"
+	"github.com/google/go-cmp/cmp"
+	"github.com/googleapis/genai-toolbox/internal/server"
+	"github.com/googleapis/genai-toolbox/internal/testutils"
+	"github.com/googleapis/genai-toolbox/internal/tools/cloudsql/cloudsqlrestorebackup"
+)
+
+func TestParseFromYaml(t *testing.T) {
+	ctx, err := testutils.ContextWithNewLogger()
+	if err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+	tcs := []struct {
+		desc string
+		in   string
+		want server.ToolConfigs
+	}{
+		{
+			desc: "basic example",
+			in: `
+			tools:
+			  restore-backup-tool:
+			    kind: cloud-sql-restore-backup
+			    description: a test description
+			    source: a-source
+			`,
+			want: server.ToolConfigs{
+				"restore-backup-tool": cloudsqlrestorebackup.Config{
+					Name:         "restore-backup-tool",
+					Kind:         "cloud-sql-restore-backup",
+					Description:  "a test description",
+					Source:       "a-source",
+					AuthRequired: []string{},
+				},
+			},
+		},
+	}
+	for _, tc := range tcs {
+		t.Run(tc.desc, func(t *testing.T) {
+			got := struct {
+				Tools server.ToolConfigs `yaml:"tools"`
+			}{}
+			err := yaml.UnmarshalContext(ctx, testutils.FormatYaml(tc.in), &got)
+			if err != nil {
+				t.Fatalf("unable to unmarshal: %s", err)
+			}
+			if diff := cmp.Diff(tc.want, got.Tools); diff != "" {
+				t.Fatalf("incorrect parse: diff %v", diff)
+			}
+		})
+	}
+}

tests/cloudsql/cloud_sql_restore_backup_test.go

@@ -0,0 +1,267 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cloudsql
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"reflect"
+	"regexp"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/googleapis/genai-toolbox/internal/testutils"
+	"github.com/googleapis/genai-toolbox/tests"
+	"google.golang.org/api/sqladmin/v1"
+)
+
+var (
+	restoreBackupToolKind = "cloud-sql-restore-backup"
+)
+
+type restoreBackupTransport struct {
+	transport http.RoundTripper
+	url       *url.URL
+}
+
+func (t *restoreBackupTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	if strings.HasPrefix(req.URL.String(), "https://sqladmin.googleapis.com") {
+		req.URL.Scheme = t.url.Scheme
+		req.URL.Host = t.url.Host
+	}
+	return t.transport.RoundTrip(req)
+}
+
+type masterRestoreBackupHandler struct {
+	t *testing.T
+}
+
+func (h *masterRestoreBackupHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if !strings.Contains(r.UserAgent(), "genai-toolbox/") {
+		h.t.Errorf("User-Agent header not found")
+	}
+	var body sqladmin.InstancesRestoreBackupRequest
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		h.t.Fatalf("failed to decode request body: %v", err)
+	} else {
+		h.t.Logf("Received request body: %+v", body)
+	}
+
+	var expectedBody sqladmin.InstancesRestoreBackupRequest
+	var response any
+	var statusCode int
+
+	switch {
+	case body.Backup != "":
+		expectedBody = sqladmin.InstancesRestoreBackupRequest{
+			Backup: "projects/p1/backups/test-uid",
+		}
+		response = map[string]any{"name": "op1", "status": "PENDING"}
+		statusCode = http.StatusOK
+	case body.BackupdrBackup != "":
+		expectedBody = sqladmin.InstancesRestoreBackupRequest{
+			BackupdrBackup: "projects/p1/locations/us-central1/backupVaults/test-vault/dataSources/test-ds/backups/test-uid",
+		}
+		response = map[string]any{"name": "op1", "status": "PENDING"}
+		statusCode = http.StatusOK
+	case body.RestoreBackupContext != nil:
+		expectedBody = sqladmin.InstancesRestoreBackupRequest{
+			RestoreBackupContext: &sqladmin.RestoreBackupContext{
+				Project:     "p1",
+				InstanceId:  "source",
+				BackupRunId: 12345,
+			},
+		}
+		response = map[string]any{"name": "op1", "status": "PENDING"}
+		statusCode = http.StatusOK
+	default:
+		http.Error(w, fmt.Sprintf("unhandled restore request body: %v", body), http.StatusInternalServerError)
+		return
+	}
+
+	if diff := cmp.Diff(expectedBody, body); diff != "" {
+		h.t.Errorf("unexpected request body (-want +got):\n%s", diff)
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(statusCode)
+	if err := json.NewEncoder(w).Encode(response); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func TestRestoreBackupToolEndpoints(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+	defer cancel()
+
+	handler := &masterRestoreBackupHandler{t: t}
+	server := httptest.NewServer(handler)
+	defer server.Close()
+
+	serverURL, err := url.Parse(server.URL)
+	if err != nil {
+		t.Fatalf("failed to parse server URL: %v", err)
+	}
+
+	originalTransport := http.DefaultClient.Transport
+	if originalTransport == nil {
+		originalTransport = http.DefaultTransport
+	}
+	http.DefaultClient.Transport = &restoreBackupTransport{
+		transport: originalTransport,
+		url:       serverURL,
+	}
+	t.Cleanup(func() {
+		http.DefaultClient.Transport = originalTransport
+	})
+
+	var args []string
+	toolsFile := getRestoreBackupToolsConfig()
+	cmd, cleanup, err := tests.StartCmd(ctx, toolsFile, args...)
+	if err != nil {
+		t.Fatalf("command initialization returned an error: %s", err)
+	}
+	defer cleanup()
+
+	waitCtx, cancel := context.WithTimeout(ctx, 30*time.Second)
+	defer cancel()
+	out, err := testutils.WaitForString(waitCtx, regexp.MustCompile(`Server ready to serve`), cmd.Out)
+	if err != nil {
+		t.Logf("toolbox command logs: \n%s", out)
+		t.Fatalf("toolbox didn't start successfully: %s", err)
+	}
+
+	tcs := []struct {
+		name        string
+		toolName    string
+		body        string
+		want        string
+		expectError bool
+		errorStatus int
+	}{
+		{
+			name:     "successful restore with standard backup",
+			toolName: "restore-backup",
+			body:     `{"target_project": "p1", "target_instance": "instance-standard", "backup_id": "12345", "source_project": "p1", "source_instance": "source"}`,
+			want:     `{"name":"op1","status":"PENDING"}`,
+		},
+		{
+			name:     "successful restore with project level backup",
+			toolName: "restore-backup",
+			body:     `{"target_project": "p1", "target_instance": "instance-project-level", "backup_id": "projects/p1/backups/test-uid"}`,
+			want:     `{"name":"op1","status":"PENDING"}`,
+		},
+		{
+			name:     "successful restore with BackupDR backup",
+			toolName: "restore-backup",
+			body:     `{"target_project": "p1", "target_instance": "instance-project-level", "backup_id": "projects/p1/locations/us-central1/backupVaults/test-vault/dataSources/test-ds/backups/test-uid"}`,
+			want:     `{"name":"op1","status":"PENDING"}`,
+		},
+		{
+			name:        "missing source instance info for standard backup",
+			toolName:    "restore-backup",
+			body:        `{"target_project": "p1", "target_instance": "instance-project-level", "backup_id": "12345"}`,
+			expectError: true,
+			errorStatus: http.StatusBadRequest,
+		},
+		{
+			name:        "missing backup identifier",
+			toolName:    "restore-backup",
+			body:        `{"target_project": "p1", "target_instance": "instance-project-level"}`,
+			expectError: true,
+			errorStatus: http.StatusBadRequest,
+		},
+		{
+			name:        "missing target instance info",
+			toolName:    "restore-backup",
+			body:        `{"backup_id": "12345"}`,
+			expectError: true,
+			errorStatus: http.StatusBadRequest,
+		},
+	}
+
+	for _, tc := range tcs {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			api := fmt.Sprintf("http://127.0.0.1:5000/api/tool/%s/invoke", tc.toolName)
+			req, err := http.NewRequest(http.MethodPost, api, bytes.NewBufferString(tc.body))
+			if err != nil {
+				t.Fatalf("unable to create request: %s", err)
+			}
+			req.Header.Add("Content-type", "application/json")
+			resp, err := http.DefaultClient.Do(req)
+			if err != nil {
+				t.Fatalf("unable to send request: %s", err)
+			}
+			defer resp.Body.Close()
+
+			if tc.expectError {
+				if resp.StatusCode != tc.errorStatus {
+					bodyBytes, _ := io.ReadAll(resp.Body)
+					t.Fatalf("expected status %d but got %d: %s", tc.errorStatus, resp.StatusCode, string(bodyBytes))
+				}
+				return
+			}
+
+			if resp.StatusCode != http.StatusOK {
+				bodyBytes, _ := io.ReadAll(resp.Body)
+				t.Fatalf("response status code is not 200, got %d: %s", resp.StatusCode, string(bodyBytes))
+			}
+
+			var result struct {
+				Result string `json:"result"`
+			}
+			if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+				t.Fatalf("failed to decode response: %v", err)
+			}
+
+			var got, want map[string]any
+			if err := json.Unmarshal([]byte(result.Result), &got); err != nil {
+				t.Fatalf("failed to unmarshal result: %v", err)
+			}
+			if err := json.Unmarshal([]byte(tc.want), &want); err != nil {
+				t.Fatalf("failed to unmarshal want: %v", err)
+			}
+
+			if !reflect.DeepEqual(got, want) {
+				t.Fatalf("unexpected result: got %+v, want %+v", got, want)
+			}
+		})
+	}
+}
+
+func getRestoreBackupToolsConfig() map[string]any {
+	return map[string]any{
+		"sources": map[string]any{
+			"my-cloud-sql-source": map[string]any{
+				"kind": "cloud-sql-admin",
+			},
+		},
+		"tools": map[string]any{
+			"restore-backup": map[string]any{
+				"kind":   restoreBackupToolKind,
+				"source": "my-cloud-sql-source",
+			},
+		},
+	}
+}