feat!: Add custom tool kind for list-tables - cloudsql-pg

[Myst9]

Description

---

This pull request introduces a new custom tool kind cloudsql-pg-list-tables that allows users to list tables within a Cloud SQL for PostgreSQL database.

Example Configuration

tools:
  cloudsql_pg_list_tables:
    kind: cloudsql-pg-list-tables
    source: cloudsql-pg-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/cloudsql_pg_list_tables/invoke \
-H "Content-Type: application/json" \
-d '{
    "table_names": "users",
    "output_format": "simple"
}'

[github-actions]

🔎 Preview at https://googleapis.github.io/genai-toolbox/previews/PR-1272/

[github-actions]

🔎 Preview at https://googleapis.github.io/genai-toolbox/previews/PR-1272/

[prernakakkar-google]

Can you add example curl call or screenshot of call in description.

[github-actions]

🔎 Preview at https://googleapis.github.io/genai-toolbox/previews/PR-1272/

[github-actions]

🔎 Preview at https://googleapis.github.io/genai-toolbox/previews/PR-1272/

[github-actions]

🔎 Preview at https://googleapis.github.io/genai-toolbox/previews/PR-1272/

[averikitsch]

We shouldn't need this new tool. We can share #1284 as per @Yuan325 comment