Return the list of tables in the current Postgres database.
AI agents call pg_list_tables to retrieve information from Database MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves schema information (table names/structure) from PostgreSQL. It has no side effects, does not execute code, and does not modify or delete data. It is purely informational, making it a Read operation with low severity risk even in misuse scenarios.
From the tool's definition Tool name 'pg_list_tables' and description 'Return the list of tables in the current Postgres database' indicate a retrieval operation that queries schema metadata without modifying, executing, or deleting data.
Attacks that exploit this kind of access
Return the list of tables in the current Postgres database. It is categorised as a Read tool in the Database MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Database MCP Server MCP server in PolicyLayer and add a rule for pg_list_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 Database MCP Server. Nothing to install.
pg_list_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 pg_list_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 pg_list_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.
pg_list_tables is provided by the Database MCP Server MCP server (kunwarmahen/db-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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