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## Description
- Adds a read-only PostgreSQL prebuilt tool
`list_autovacuum_configurations`, that returns the autovacuum
configurations name and corresponding settings from pg_settings view.
- Adds a read-only PostgreSQL prebuilt tool
`list_memory_configurations`, that returns the memory configurations
name and corresponding settings from `pg_settings` view.
- Adds a read-only PostgreSQL prebuilt tool `list_top_bloated_tables`,
that returns the top N tables based of dead tuple count. Each row
includes: `schema_name`, `relation_name`, `live_tuple`, `dead_tuple`,
`dead_tuple_percentage`, `last_vacuum`, `last_autovacuum`,
`last_analyze`, `last_autoanalyze`.
- Parameters supported:
- `limit` (optional): Maximum numbers of results to return. Default: 50
- Adds a read-only PostgreSQL prebuilt tool `list_replication_slots`,
that returns the details of replication slots and WAL retained on it
Each row includes: `slot_name`, `slot_type`, `plugin`, `database`,
`temporary`, `active`, `restart_lsn`, `confirmed_flush_lsn`,
`catalog_min`, `retained_wal`.
- Adds a read-only PostgreSQL prebuilt tool `list_invalid_indexes`, that
returns the details of invalid indexes present in database. Each row
includes: `schema_name`, `index_name`, `table_name`, `index_size`,
`indisready`, `indisvalid`, `index_def`.
- Adds a read-only PostgreSQL prebuilt tool, `get_query_plan`, that
returns the optimizer’s estimated plan for a single SQL statement using
`EXPLAIN (FORMAT JSON)`—without executing the query. Output includes
node types, estimated rows, costs, width, and planner/JIT details when
available. Safe for production use in plan inspection, regression
checks, and query tuning workflows.
**Test Output**
- `list_autovacuum_configurations`
<img width="1442" height="734" alt="image"
src="https://github.com/user-attachments/assets/776b7c78-eefb-4e2a-b71b-5555cbbd7664"
/>
- `list_memory_configurations`
<img width="1423" height="728" alt="image"
src="https://github.com/user-attachments/assets/10167440-c36c-4ee8-83b9-a6ff017d7cb3"
/>
- `list_top_bloated_tables`
<img width="1424" height="733" alt="image"
src="https://github.com/user-attachments/assets/fca3f03c-e6ca-451a-849d-24f2eee058f5"
/>
- `list_replication_slots`
<img width="1411" height="727" alt="image"
src="https://github.com/user-attachments/assets/b0161bdd-ca84-4d4e-81bb-31181856c823"
/>
- `list_invalid_indexes`
<img width="1413" height="731" alt="image"
src="https://github.com/user-attachments/assets/26145cb7-2dfb-40dd-a519-138489e3f1a6"
/>
- `get_query_plan `
<img width="1437" height="727" alt="image"
src="https://github.com/user-attachments/assets/bf674ef6-86a2-4de5-b1d7-78b62cf4928c"
/>
---
> 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: Averi Kitsch <akitsch@google.com>