PostgreSQL_list_schemas

What PostgreSQL_list_schemas does on Postgres

AI agents call PostgreSQL_list_schemas to retrieve information from Postgres without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Why PostgreSQL_list_schemas is rated Low

The tool retrieves metadata about database schemas without side effects. It performs a simple information query analogous to INFORMATION_SCHEMA lookups or \dn commands in PostgreSQL. This is a read operation with minimal blast radius—disclosure of schema names is generally low-risk, though schema names themselves may reveal some organizational structure of the database.

From the tool's definition Tool name and description indicate a schema listing operation: 'List all schemas in the database.' This is a read-only query with no modification, deletion, or execution of arbitrary code.

The rule that runs PostgreSQL_list_schemas safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Postgres, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For PostgreSQL_list_schemas, this is the rule to start with:

{
  "version": "1",
  "default": "deny",
  "tools": {
    "PostgreSQL_list_schemas": {}
  }
}

Questions about PostgreSQL_list_schemas