docs: migrate to toolbox-adk and simplified ToolboxToolset (#2211 )

Updates all quickstart guides and samples to use the new `toolbox-adk` package instead of the legacy `toolbox-core`. Also updates `ToolboxToolset` usage to rely on the simplified constructor (implicit authentication) and ensures correct dependency installation. > [!NOTE] > The integration tests are failing because the `google-adk` package is not released yet with the newer changes from `toolbox-adk`. This is expected behavior until the [package update](cl/853799009) is released.
2026-01-28 08:48:09 -05:00 · 2026-01-28 11:26:13 +05:30
27 changed files with 117 additions and 126 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,22 +1,5 @@
 # Changelog

-## [1.0.0](https://github.com/googleapis/genai-toolbox/compare/v0.26.0...v1.0.0) (2026-01-28)
-
-
-### ⚠ BREAKING CHANGES
-
-* update configuration file v2 ([#2369](https://github.com/googleapis/genai-toolbox/issues/2369))
-
-### Features
-
-* Update configuration file v2 ([#2369](https://github.com/googleapis/genai-toolbox/issues/2369)) ([293c1d6](https://github.com/googleapis/genai-toolbox/commit/293c1d6889c39807855ba5e01d4c13ba2a4c50ce))
-
-
-### Bug Fixes
-
-* **dataplex:** Capture GCP HTTP errors in MCP Toolbox ([#2347](https://github.com/googleapis/genai-toolbox/issues/2347)) ([1d7c498](https://github.com/googleapis/genai-toolbox/commit/1d7c4981164c34b4d7bc8edecfd449f57ad11e15))
-* Surface Dataplex API errors in MCP results ([1d7c498](https://github.com/googleapis/genai-toolbox/commit/1d7c4981164c34b4d7bc8edecfd449f57ad11e15))
-
 ## [0.26.0](https://github.com/googleapis/genai-toolbox/compare/v0.25.0...v0.26.0) (2026-01-22)


--- a/README.md
+++ b/README.md
@@ -142,7 +142,7 @@ To install Toolbox as a binary:
 >
 > ```sh
 > # see releases page for other versions
-> export VERSION=1.0.0
+> export VERSION=0.26.0
 > curl -L -o toolbox https://storage.googleapis.com/genai-toolbox/v$VERSION/linux/amd64/toolbox
 > chmod +x toolbox
 > ```
@@ -155,7 +155,7 @@ To install Toolbox as a binary:
 >
 > ```sh
 > # see releases page for other versions
-> export VERSION=1.0.0
+> export VERSION=0.26.0
 > curl -L -o toolbox https://storage.googleapis.com/genai-toolbox/v$VERSION/darwin/arm64/toolbox
 > chmod +x toolbox
 > ```
@@ -168,7 +168,7 @@ To install Toolbox as a binary:
 >
 > ```sh
 > # see releases page for other versions
-> export VERSION=1.0.0
+> export VERSION=0.26.0
 > curl -L -o toolbox https://storage.googleapis.com/genai-toolbox/v$VERSION/darwin/amd64/toolbox
 > chmod +x toolbox
 > ```
@@ -181,7 +181,7 @@ To install Toolbox as a binary:
 >
 > ```cmd
 > :: see releases page for other versions
-> set VERSION=1.0.0
+> set VERSION=0.26.0
 > curl -o toolbox.exe "https://storage.googleapis.com/genai-toolbox/v%VERSION%/windows/amd64/toolbox.exe"
 > ```
 >
@@ -193,7 +193,7 @@ To install Toolbox as a binary:
 >
 > ```powershell
 > # see releases page for other versions
-> $VERSION = "1.0.0"
+> $VERSION = "0.26.0"
 > curl.exe -o toolbox.exe "https://storage.googleapis.com/genai-toolbox/v$VERSION/windows/amd64/toolbox.exe"
 > ```
 >
@@ -206,7 +206,7 @@ You can also install Toolbox as a container:

 ```sh
 # see releases page for other versions
-export VERSION=1.0.0
+export VERSION=0.26.0
 docker pull us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:$VERSION
 ```

@@ -230,7 +230,7 @@ To install from source, ensure you have the latest version of
 [Go installed](https://go.dev/doc/install), and then run the following command:

 ```sh
-go install github.com/googleapis/genai-toolbox@v1.0.0
+go install github.com/googleapis/genai-toolbox@v0.26.0
 ```
 <!-- {x-release-please-end} -->

--- a/cmd/version.txt
+++ b/cmd/version.txt
@@ -1 +1 @@
-1.0.0
+0.26.0
--- a/docs/en/getting-started/colab_quickstart.ipynb
+++ b/docs/en/getting-started/colab_quickstart.ipynb
@@ -234,7 +234,7 @@
      },
      "outputs": [],
      "source": [
-        "version = \"1.0.0\" # x-release-please-version\n",
+        "version = \"0.26.0\" # x-release-please-version\n",
        "! curl -O https://storage.googleapis.com/genai-toolbox/v{version}/linux/amd64/toolbox\n",
        "\n",
        "# Make the binary executable\n",
@@ -520,8 +520,7 @@
      },
      "outputs": [],
      "source": [
-        "! pip install toolbox-core --quiet\n",
-        "! pip install google-adk --quiet"
+        "! pip install google-adk[toolbox] --quiet"
      ]
    },
    {
@@ -536,14 +535,18 @@
        "from google.adk.runners import Runner\n",
        "from google.adk.sessions import InMemorySessionService\n",
        "from google.adk.artifacts.in_memory_artifact_service import InMemoryArtifactService\n",
+        "from google.adk.tools.toolbox_toolset import ToolboxToolset\n",
        "from google.genai import types\n",
-        "from toolbox_core import ToolboxSyncClient\n",
        "\n",
        "import os\n",
        "# TODO(developer): replace this with your Google API key\n",
        "os.environ['GOOGLE_API_KEY'] = \"<GOOGLE_API_KEY>\"\n",
        "\n",
-        "toolbox_client = ToolboxSyncClient(\"http://127.0.0.1:5000\")\n",
+        "# Configure toolset\n",
+        "toolset = ToolboxToolset(\n",
+        "    server_url=\"http://127.0.0.1:5000\",\n",
+        "    toolset_name=\"my-toolset\"\n",
+        ")\n",
        "\n",
        "prompt = \"\"\"\n",
        "  You're a helpful hotel assistant. You handle hotel searching, booking and\n",
@@ -560,7 +563,7 @@
        "    name='hotel_agent',\n",
        "    description='A helpful AI assistant.',\n",
        "    instruction=prompt,\n",
-        "    tools=toolbox_client.load_toolset(\"my-toolset\"),\n",
+        "    tools=[toolset],\n",
        ")\n",
        "\n",
        "session_service = InMemorySessionService()\n",
--- a/docs/en/getting-started/introduction/_index.md
+++ b/docs/en/getting-started/introduction/_index.md
@@ -109,7 +109,7 @@ To install Toolbox as a binary on Linux (AMD64):

 ```sh
 # see releases page for other versions
-export VERSION=1.0.0
+export VERSION=0.26.0
 curl -L -o toolbox https://storage.googleapis.com/genai-toolbox/v$VERSION/linux/amd64/toolbox
 chmod +x toolbox
 ```
@@ -120,7 +120,7 @@ To install Toolbox as a binary on macOS (Apple Silicon):

 ```sh
 # see releases page for other versions
-export VERSION=1.0.0
+export VERSION=0.26.0
 curl -L -o toolbox https://storage.googleapis.com/genai-toolbox/v$VERSION/darwin/arm64/toolbox
 chmod +x toolbox
 ```
@@ -131,7 +131,7 @@ To install Toolbox as a binary on macOS (Intel):

 ```sh
 # see releases page for other versions
-export VERSION=1.0.0
+export VERSION=0.26.0
 curl -L -o toolbox https://storage.googleapis.com/genai-toolbox/v$VERSION/darwin/amd64/toolbox
 chmod +x toolbox
 ```
@@ -142,7 +142,7 @@ To install Toolbox as a binary on Windows (Command Prompt):

 ```cmd
 :: see releases page for other versions
-set VERSION=1.0.0
+set VERSION=0.26.0
 curl -o toolbox.exe "https://storage.googleapis.com/genai-toolbox/v%VERSION%/windows/amd64/toolbox.exe"
 ```

@@ -152,7 +152,7 @@ To install Toolbox as a binary on Windows (PowerShell):

 ```powershell
 # see releases page for other versions
-$VERSION = "1.0.0"
+$VERSION = "0.26.0"
 curl.exe -o toolbox.exe "https://storage.googleapis.com/genai-toolbox/v$VERSION/windows/amd64/toolbox.exe"
 ```

@@ -164,7 +164,7 @@ You can also install Toolbox as a container:

 ```sh
 # see releases page for other versions
-export VERSION=1.0.0
+export VERSION=0.26.0
 docker pull us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:$VERSION
 ```

@@ -183,7 +183,7 @@ To install from source, ensure you have the latest version of
 [Go installed](https://go.dev/doc/install), and then run the following command:

 ```sh
-go install github.com/googleapis/genai-toolbox@v1.0.0
+go install github.com/googleapis/genai-toolbox@v0.26.0
 ```

 {{% /tab %}}
--- a/docs/en/getting-started/local_quickstart.md
+++ b/docs/en/getting-started/local_quickstart.md
@@ -52,7 +52,7 @@ runtime](https://research.google.com/colaboratory/local-runtimes.html).
    {{< tabpane persist=header >}}
 {{< tab header="ADK" lang="bash" >}}

-pip install toolbox-core
+pip install google-adk[toolbox]
 {{< /tab >}}
 {{< tab header="Langchain" lang="bash" >}}

@@ -73,7 +73,7 @@ pip install toolbox-core
    {{< tabpane persist=header >}}
 {{< tab header="ADK" lang="bash" >}}

-pip install google-adk
+# No other dependencies required for ADK
 {{< /tab >}}
 {{< tab header="Langchain" lang="bash" >}}

--- a/docs/en/getting-started/mcp_quickstart/_index.md
+++ b/docs/en/getting-started/mcp_quickstart/_index.md
@@ -105,7 +105,7 @@ In this section, we will download Toolbox, configure our tools in a
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

--- a/docs/en/getting-started/quickstart/python/adk/quickstart.py
+++ b/docs/en/getting-started/quickstart/python/adk/quickstart.py
@@ -1,15 +1,17 @@
 from google.adk import Agent
 from google.adk.apps import App
-from toolbox_core import ToolboxSyncClient
+from google.adk.tools.toolbox_toolset import ToolboxToolset

 # TODO(developer): update the TOOLBOX_URL to your toolbox endpoint
-client = ToolboxSyncClient("http://127.0.0.1:5000")
+toolset = ToolboxToolset(
+    server_url="http://127.0.0.1:5000",
+)

 root_agent = Agent(
    name='root_agent',
    model='gemini-2.5-flash',
    instruction="You are a helpful AI assistant designed to provide accurate and useful information.",
-    tools=client.load_toolset(),
+    tools=[toolset],
 )

 app = App(root_agent=root_agent, name="my_agent")
--- a/docs/en/getting-started/quickstart/python/adk/requirements.txt
+++ b/docs/en/getting-started/quickstart/python/adk/requirements.txt
@@ -1,3 +1,2 @@
-google-adk==1.21.0
-toolbox-core==0.5.4
+google-adk[toolbox]==1.23.0
 pytest==9.0.2
--- a/docs/en/getting-started/quickstart/shared/configure_toolbox.md
+++ b/docs/en/getting-started/quickstart/shared/configure_toolbox.md
@@ -13,7 +13,7 @@ In this section, we will download Toolbox, configure our tools in a
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

--- a/docs/en/how-to/connect-ide/looker_mcp.md
+++ b/docs/en/how-to/connect-ide/looker_mcp.md
@@ -100,19 +100,19 @@ After you install Looker in the MCP Store, resources and tools from the server a

 {{< tabpane persist=header >}}
 {{< tab header="linux/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/linux/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/linux/amd64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/arm64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/arm64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/arm64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/amd64/toolbox
 {{< /tab >}}

 {{< tab header="windows/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/windows/amd64/toolbox.exe
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/windows/amd64/toolbox.exe
 {{< /tab >}}
 {{< /tabpane >}}
    <!-- {x-release-please-end} -->
--- a/docs/en/how-to/connect-ide/mssql_mcp.md
+++ b/docs/en/how-to/connect-ide/mssql_mcp.md
@@ -45,19 +45,19 @@ instance:
   <!-- {x-release-please-start-version} -->
   {{< tabpane persist=header >}}
 {{< tab header="linux/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/linux/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/linux/amd64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/arm64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/arm64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/arm64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/amd64/toolbox
 {{< /tab >}}

 {{< tab header="windows/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/windows/amd64/toolbox.exe
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/windows/amd64/toolbox.exe
 {{< /tab >}}
 {{< /tabpane >}}
    <!-- {x-release-please-end} -->
--- a/docs/en/how-to/connect-ide/mysql_mcp.md
+++ b/docs/en/how-to/connect-ide/mysql_mcp.md
@@ -43,19 +43,19 @@ expose your developer assistant tools to a MySQL instance:
   <!-- {x-release-please-start-version} -->
   {{< tabpane persist=header >}}
 {{< tab header="linux/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/linux/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/linux/amd64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/arm64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/arm64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/arm64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/amd64/toolbox
 {{< /tab >}}

 {{< tab header="windows/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/windows/amd64/toolbox.exe
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/windows/amd64/toolbox.exe
 {{< /tab >}}
 {{< /tabpane >}}
    <!-- {x-release-please-end} -->
--- a/docs/en/how-to/connect-ide/neo4j_mcp.md
+++ b/docs/en/how-to/connect-ide/neo4j_mcp.md
@@ -44,19 +44,19 @@ expose your developer assistant tools to a Neo4j instance:
   <!-- {x-release-please-start-version} -->
   {{< tabpane persist=header >}}
 {{< tab header="linux/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/linux/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/linux/amd64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/arm64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/arm64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/arm64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/amd64/toolbox
 {{< /tab >}}

 {{< tab header="windows/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/windows/amd64/toolbox.exe
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/windows/amd64/toolbox.exe
 {{< /tab >}}
 {{< /tabpane >}}
    <!-- {x-release-please-end} -->
--- a/docs/en/how-to/connect-ide/postgres_mcp.md
+++ b/docs/en/how-to/connect-ide/postgres_mcp.md
@@ -56,19 +56,19 @@ Omni](https://cloud.google.com/alloydb/omni/current/docs/overview).
   <!-- {x-release-please-start-version} -->
   {{< tabpane persist=header >}}
 {{< tab header="linux/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/linux/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/linux/amd64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/arm64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/arm64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/arm64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/amd64/toolbox
 {{< /tab >}}

 {{< tab header="windows/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/windows/amd64/toolbox.exe
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/windows/amd64/toolbox.exe
 {{< /tab >}}
 {{< /tabpane >}}
    <!-- {x-release-please-end} -->
--- a/docs/en/how-to/connect-ide/sqlite_mcp.md
+++ b/docs/en/how-to/connect-ide/sqlite_mcp.md
@@ -43,19 +43,19 @@ to expose your developer assistant tools to a SQLite instance:
   <!-- {x-release-please-start-version} -->
   {{< tabpane persist=header >}}
 {{< tab header="linux/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/linux/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/linux/amd64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/arm64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/arm64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/arm64/toolbox
 {{< /tab >}}

 {{< tab header="darwin/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/darwin/amd64/toolbox
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/darwin/amd64/toolbox
 {{< /tab >}}

 {{< tab header="windows/amd64" lang="bash" >}}
-curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/windows/amd64/toolbox.exe
+curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/windows/amd64/toolbox.exe
 {{< /tab >}}
 {{< /tabpane >}}
    <!-- {x-release-please-end} -->
--- a/docs/en/how-to/deploy_adk_agent.md
+++ b/docs/en/how-to/deploy_adk_agent.md
@@ -46,10 +46,10 @@ with the necessary configuration for deployment to Vertex AI Agent Engine.
    process will generate deployment configuration files (like a `Makefile` and
    `Dockerfile`) in your project directory.

-4.  Add `toolbox-core` as a dependency to the new project:
+4.  Add `google-adk[toolbox]` as a dependency to the new project:

    ```bash
-    uv add toolbox-core
+    uv add google-adk[toolbox]
    ```

 ## Step 3: Configure Google Cloud Authentication
@@ -95,22 +95,23 @@ authentication token.
    ```python
    from google.adk import Agent
    from google.adk.apps import App
-    from toolbox_core import ToolboxSyncClient, auth_methods
+    from google.adk.tools.toolbox_toolset import ToolboxToolset
+    from toolbox_adk import CredentialStrategy

    # TODO(developer): Replace with your Toolbox Cloud Run Service URL
    TOOLBOX_URL = "https://your-toolbox-service-xyz.a.run.app"

-    # Initialize the client with the Cloud Run URL and Auth headers
-    client = ToolboxSyncClient(
-        TOOLBOX_URL, 
-        client_headers={"Authorization": auth_methods.get_google_id_token(TOOLBOX_URL)}
+    # Initialize the toolset with Workload Identity (generates ID token for the URL)
+    toolset = ToolboxToolset(
+        server_url=TOOLBOX_URL,
+        credentials=CredentialStrategy.workload_identity(target_audience=TOOLBOX_URL)
    )

    root_agent = Agent(
        name='root_agent',
        model='gemini-2.5-flash',
        instruction="You are a helpful AI assistant designed to provide accurate and useful information.",
-        tools=client.load_toolset(),
+        tools=[toolset],
    )

    app = App(root_agent=root_agent, name="my_agent")
--- a/docs/en/samples/alloydb/ai-nl/alloydb_ai_nl.ipynb
+++ b/docs/en/samples/alloydb/ai-nl/alloydb_ai_nl.ipynb
@@ -771,7 +771,7 @@
      },
      "outputs": [],
      "source": [
-        "version = \"1.0.0\" # x-release-please-version\n",
+        "version = \"0.26.0\" # x-release-please-version\n",
        "! curl -L -o /content/toolbox https://storage.googleapis.com/genai-toolbox/v{version}/linux/amd64/toolbox\n",
        "\n",
        "# Make the binary executable\n",
--- a/docs/en/samples/alloydb/mcp_quickstart.md
+++ b/docs/en/samples/alloydb/mcp_quickstart.md
@@ -123,7 +123,7 @@ In this section, we will download and install the Toolbox binary.
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    export VERSION="1.0.0"
+    export VERSION="0.26.0"
    curl -O https://storage.googleapis.com/genai-toolbox/v$VERSION/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->
--- a/docs/en/samples/bigquery/colab_quickstart_bigquery.ipynb
+++ b/docs/en/samples/bigquery/colab_quickstart_bigquery.ipynb
@@ -220,7 +220,7 @@
      },
      "outputs": [],
      "source": [
-        "version = \"1.0.0\" # x-release-please-version\n",
+        "version = \"0.26.0\" # x-release-please-version\n",
        "! curl -O https://storage.googleapis.com/genai-toolbox/v{version}/linux/amd64/toolbox\n",
        "\n",
        "# Make the binary executable\n",
--- a/docs/en/samples/bigquery/local_quickstart.md
+++ b/docs/en/samples/bigquery/local_quickstart.md
@@ -179,7 +179,7 @@ to use BigQuery, and then run the Toolbox server.
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

@@ -335,7 +335,7 @@ pip install toolbox-llamaindex
 {{< /tab >}}
 {{< tab header="ADK" lang="bash" >}}

-pip install google-adk
+pip install google-adk[toolbox]
 {{< /tab >}}

 {{< /tabpane >}}
@@ -375,7 +375,7 @@ pip install llama-index-llms-google-genai

 {{< /tab >}}
 {{< tab header="ADK" lang="bash" >}}
-pip install toolbox-core
+# No other dependencies required for ADK
 {{< /tab >}}
 {{< /tabpane >}}

@@ -617,8 +617,8 @@ from google.adk.agents import Agent
 from google.adk.runners import Runner
 from google.adk.sessions import InMemorySessionService
 from google.adk.artifacts.in_memory_artifact_service import InMemoryArtifactService
+from google.adk.tools.toolbox_toolset import ToolboxToolset
 from google.genai import types # For constructing message content
-from toolbox_core import ToolboxSyncClient

 import os
 os.environ['GOOGLE_GENAI_USE_VERTEXAI'] = 'True'
@@ -633,48 +633,47 @@ os.environ['GOOGLE_CLOUD_LOCATION'] = 'us-central1'

 # --- Load Tools from Toolbox ---

-# TODO(developer): Ensure the Toolbox server is running at <http://127.0.0.1:5000>
+# TODO(developer): Ensure the Toolbox server is running at http://127.0.0.1:5000
+toolset = ToolboxToolset(server_url="http://127.0.0.1:5000")

-with ToolboxSyncClient("<http://127.0.0.1:5000>") as toolbox_client:
-    # TODO(developer): Replace "my-toolset" with the actual ID of your toolset as configured in your MCP Toolbox server.
-    agent_toolset = toolbox_client.load_toolset("my-toolset")
+# --- Define the Agent's Prompt ---
+prompt = """
+  You're a helpful hotel assistant. You handle hotel searching, booking and
+  cancellations. When the user searches for a hotel, mention it's name, id,
+  location and price tier. Always mention hotel ids while performing any
+  searches. This is very important for any operations. For any bookings or
+  cancellations, please provide the appropriate confirmation. Be sure to
+  update checkin or checkout dates if mentioned by the user.
+  Don't ask for confirmations from the user.
+"""

-    # --- Define the Agent's Prompt ---
-    prompt = """
-      You're a helpful hotel assistant. You handle hotel searching, booking and
-      cancellations. When the user searches for a hotel, mention it's name, id,
-      location and price tier. Always mention hotel ids while performing any
-      searches. This is very important for any operations. For any bookings or
-      cancellations, please provide the appropriate confirmation. Be sure to
-      update checkin or checkout dates if mentioned by the user.
-      Don't ask for confirmations from the user.
-    """
+# --- Configure the Agent ---

-    # --- Configure the Agent ---
+root_agent = Agent(
+    model='gemini-2.0-flash-001',
+    name='hotel_agent',
+    description='A helpful AI assistant that can search and book hotels.',
+    instruction=prompt,
+    tools=[toolset], # Pass the loaded toolset
+)

-    root_agent = Agent(
-        model='gemini-2.0-flash-001',
-        name='hotel_agent',
-        description='A helpful AI assistant that can search and book hotels.',
-        instruction=prompt,
-        tools=agent_toolset, # Pass the loaded toolset
-    )
+# --- Initialize Services for Running the Agent ---
+session_service = InMemorySessionService()
+artifacts_service = InMemoryArtifactService()

-    # --- Initialize Services for Running the Agent ---
-    session_service = InMemorySessionService()
-    artifacts_service = InMemoryArtifactService()
+runner = Runner(
+    app_name='hotel_agent',
+    agent=root_agent,
+    artifact_service=artifacts_service,
+    session_service=session_service,
+)
+
+async def main():
    # Create a new session for the interaction.
-    session = session_service.create_session(
+    session = await session_service.create_session(
        state={}, app_name='hotel_agent', user_id='123'
    )

-    runner = Runner(
-        app_name='hotel_agent',
-        agent=root_agent,
-        artifact_service=artifacts_service,
-        session_service=session_service,
-    )
-
    # --- Define Queries and Run the Agent ---
    queries = [
        "Find hotels in Basel with Basel in it's name.",
@@ -697,6 +696,10 @@ with ToolboxSyncClient("<http://127.0.0.1:5000>") as toolbox_client:

        for text in responses:
          print(text)
+
+import asyncio
+if __name__ == "__main__":
+    asyncio.run(main())
 {{< /tab >}}
 {{< /tabpane >}}

--- a/docs/en/samples/bigquery/mcp_quickstart/_index.md
+++ b/docs/en/samples/bigquery/mcp_quickstart/_index.md
@@ -98,7 +98,7 @@ In this section, we will download Toolbox, configure our tools in a
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

--- a/docs/en/samples/looker/looker_gemini.md
+++ b/docs/en/samples/looker/looker_gemini.md
@@ -34,7 +34,7 @@ In this section, we will download Toolbox and run the Toolbox server.
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

--- a/docs/en/samples/looker/looker_gemini_oauth/_index.md
+++ b/docs/en/samples/looker/looker_gemini_oauth/_index.md
@@ -48,7 +48,7 @@ In this section, we will download Toolbox and run the Toolbox server.
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

--- a/docs/en/samples/looker/looker_mcp_inspector/_index.md
+++ b/docs/en/samples/looker/looker_mcp_inspector/_index.md
@@ -34,7 +34,7 @@ In this section, we will download Toolbox and run the Toolbox server.
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v1.0.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.26.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->

--- a/gemini-extension.json
+++ b/gemini-extension.json
@@ -1,6 +1,6 @@
 {
  "name": "mcp-toolbox-for-databases",
-  "version": "1.0.0",
+  "version": "0.26.0",
  "description": "MCP Toolbox for Databases is an open-source MCP server for more than 30 different datasources.",
  "contextFileName": "MCP-TOOLBOX-EXTENSION.md"
 }
--- a/server.json
+++ b/server.json
@@ -14,11 +14,11 @@
        "url": "https://github.com/googleapis/genai-toolbox",
        "source": "github"
    },
-    "version": "1.0.0",
+    "version": "0.26.0",
    "packages": [
        {
            "registryType": "oci",
-            "identifier": "us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:1.0.0",
+            "identifier": "us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:0.26.0",
            "transport": {
                "type": "streamable-http",
                "url": "http://{host}:{port}/mcp"
@@ -1 +1 @@
 .0.0
 .26.0