postgres-get-schema · Mcp Gmail MCP: Risk & Policy

WHAT IT DOES

What postgres-get-schema does on Mcp Gmail

AI agents call postgres-get-schema to retrieve information from Mcp Gmail without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why postgres-get-schema needs a policy

This tool appears to retrieve database schema metadata without modifying data. The absence of action verbs like 'create', 'update', 'delete', or 'execute' suggests a read operation. However, confidence is reduced due to empty description and inconsistency with the stated server being 'Mcp Gmail'—this tool appears to belong to a different server context entirely.

From the tool's definition Tool name 'postgres-get-schema' indicates schema retrieval from a PostgreSQL database. No description provided, but '-get-' prefix and 'schema' noun suggest read-only query operation.

Attacks that exploit this kind of access

Questions about postgres-get-schema

What does the postgres-get-schema tool do? +

postgres-get-schema. It is categorised as a Read tool in the Mcp Gmail MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on postgres-get-schema? +

Register the Mcp Gmail MCP server in PolicyLayer and add a rule for postgres-get-schema: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Gmail. Nothing to install.

What risk level is postgres-get-schema? +

postgres-get-schema is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit postgres-get-schema? +

Yes. Add a rate_limit block to the postgres-get-schema rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block postgres-get-schema completely? +

Set action: deny in the PolicyLayer policy for postgres-get-schema. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides postgres-get-schema? +

postgres-get-schema is provided by the Mcp Gmail MCP server (@monsoft/mcp-gmail). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.