## Description
Add a read-only PostgreSQL custom list_schemas tool, that returns the
schemas present in the database excluding system and temporary schemas.
Returns the schema name, schema owner, grants, number of functions,
number of tables, and number of views within each schema.
<img width="1985" height="1043" alt="Screenshot 2025-10-20 at 7 45
45 PM"
src="https://github.com/user-attachments/assets/8c4f0bb8-587c-489a-8795-efa79e92b06f"
/>
<img width="3372" height="1694" alt="3NpZG7W6h3XGsM7"
src="https://github.com/user-attachments/assets/370b5440-cc48-4c4e-82ea-4fd508cbcf2b"
/>
> Should include a concise description of the changes (bug or feature),
it's
> impact, along with a summary of the solution
## 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 #<issue_number_goes_here>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>
## Description
Adds a read-only PostgreSQL custom list_views tool, that returns the
details of views present in database. Each row includes: schema_name,
view_name, owner_name
Test Output:
<img width="2433" height="1274" alt="Screenshot 2025-10-19 at 3 59
31 PM"
src="https://github.com/user-attachments/assets/76e1e994-390a-4239-aba7-0d02253bbcc4"
/>
<img width="2533" height="1017" alt="Screenshot 2025-10-19 at 4 07
25 PM"
src="https://github.com/user-attachments/assets/537fbddd-d862-4044-a09b-cb9f180c21fa"
/>
## 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#1738
Co-authored-by: Averi Kitsch <akitsch@google.com>
## Description
This PR adds two read-only, PostgreSQL tool kinds to MCPToolbox that
standardize discovery of extensions:
- `postgres-list-installed-extensions` – lists extensions installed in
the current database with: `name`, `version`, `schema`, `owner`
`description`.
- `postgres-list-available-extensions` – lists extensions available to
install on the cluster with: `name`, `default_version`, `description`.
Both are safe by default, and return well-typed JSON suitable for UIs,
agents, and automation.
**Test Output**
- `list_installed_extensions`
<img width="1414" height="781" alt="image"
src="https://github.com/user-attachments/assets/aab102a7-90ab-4516-9bc2-bcbfdab02bb1"
/>
- `list_available_extensions`
<img width="1421" height="774" alt="image"
src="https://github.com/user-attachments/assets/a4f80f22-bb2e-4350-acb2-12eb020d88cb"
/>
---
> Should include a concise description of the changes (bug or feature),
it's
> impact, along with a summary of the solution
## 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 #<issue_number_goes_here>
## Description
Adds a PostgreSQL tool kind `postgres-list-active-queries` that returns
the top N currently running queries (`state='active'`) from
`pg_stat_activity`, ordered by longest running first. Each row includes:
`pid`, `user`, `database`, `application_name`, `client_addr`, `state`,
`wait_event_type`, `wait_event`, `backend_start`, `xact_start`,
`query_start`, computed `duration`, and `query` (SQL text).
Parameters supported
- `min_duration` (optional) — only include queries running at least this
long (e.g., "1 minute", "2 seconds").
- `exclude_application_names`(optional) — comma-separated list of
application_name values to exclude (e.g., "psql,pgAdmin 4,my-batch").
- `limit` (optional) — max rows to return (default 50).
**Test Output**
- Test without filter:
<img width="1439" height="894" alt="image"
src="https://github.com/user-attachments/assets/92009211-4f71-4830-a689-4fd2f0558477"
/>
- Test with filter, but response
<img width="1451" height="893" alt="image"
src="https://github.com/user-attachments/assets/903a0fc4-ad3e-4e9f-aacd-0b6349addc94"
/>
- Test with filter, but no response
<img width="1411" height="896" alt="image"
src="https://github.com/user-attachments/assets/a4d74883-11cc-402f-abcf-cd998e247209"
/>
---
> Should include a concise description of the changes (bug or feature),
it's
> impact, along with a summary of the solution
## 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
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>
## Description
---
This pull request introduces a new custom tool kind
`postgres-list-tables` that allows users to list tables within a
Postgres database.
### Example Configuration
```yaml
tools:
postgres_list_tables:
kind: postgres-list-tables
source: postgres-source
description: Use this tool to retrieve schema information for all or specified tables. Output format can be simple (only table names) or detailed.
```
### Example Request
```
curl -X POST http://127.0.0.1:5000/api/tool/postgres_list_tables/invoke \
-H "Content-Type: application/json" \
-d '{
"table_names": "users",
"output_format": "simple"
}'
```
## 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)
- [ ] Make sure to open an issue as a
[bug/issue](https://github.com/googleapis/langchain-google-alloydb-pg-python/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
---------
Co-authored-by: Averi Kitsch <akitsch@google.com>
