This tool can be used across all postgres sources.
`postgres-execute-sql` config is as below:
```
tools:
postgres_execute_sql_tool:
kind: "postgres-execute-sql"
source: my-alloydb-source // or any other sources that is compatible with this tool
description: Use this tool to execute sql.
```
The `postgres-execute-sql` tool takes one parameter. Example request as
follow:
```
curl -X POST -H "Content-Type: application/json" -d '{"sql": "SELECT 1"}' http://127.0.0.1:5000/api/tool/postgres_execute_sql_tool/invoke
```
