AI agents call get_top_queries to retrieve information from Postgres without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to query database statistics or logs to return information about frequently-executed or resource-intensive queries. This is a read-only operation with no side effects—it retrieves existing data without modification or execution of arbitrary statements.
From the tool's definition Tool name 'get_top_queries' suggests retrieving query metadata or statistics; no description provided. Based on naming convention and the context of a Postgres MCP server with health checks and explain plans, this tool likely retrieves query performance data…
Attacks that exploit this kind of access
get_top_queries. It is categorised as a Read tool in the Postgres MCP Server, which means it retrieves data without modifying state.
Register the Postgres MCP server in PolicyLayer and add a rule for get_top_queries: 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 Postgres. Nothing to install.
get_top_queries 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 get_top_queries 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 get_top_queries. 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.
get_top_queries is provided by the Postgres MCP server (mirenqinggege/postgres-mcp). 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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