## 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>
