Get list of all tables in the database
AI agents call postgres_get_tables to retrieve information from Gmail & PostgreSQL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns database schema information (table names). It performs no write, execution, deletion, or financial operations. It is purely informational retrieval with no side effects, matching the 'Read' category. Severity is low because exposure of table names alone does not enable immediate harm, though it could inform reconnaissance for follow-up attacks.
From the tool's definition Tool name is 'postgres_get_tables' and description states 'Get list of all tables in the database' — a schema inspection operation that retrieves metadata without modifying data.
Attacks that exploit this kind of access
Get list of all tables in the database. It is categorised as a Read tool in the Gmail & PostgreSQL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Gmail & PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for postgres_get_tables: 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 Gmail & PostgreSQL MCP Server. Nothing to install.
postgres_get_tables is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the postgres_get_tables 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.
Set action: deny in the PolicyLayer policy for postgres_get_tables. 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.
postgres_get_tables is provided by the Gmail & PostgreSQL MCP Server MCP server (marouanemkm/gmail-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
postgres_get_tables is one line of Gmail & PostgreSQL MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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