Analyze slow queries with optimization suggestions (requires pg_stat_statements)
AI agents call slow_query_analyzer to retrieve information from Postgres Mcp Legacy without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and examines query performance metadata from pg_stat_statements (a PostgreSQL extension that logs query statistics) and provides optimization recommendations. It performs introspection only; it does not execute arbitrary queries, modify the database, delete data, or trigger external operations.
From the tool's definition Tool name includes 'analyzer' and description states 'Analyze slow queries with optimization suggestions' — a query analysis function that reads query statistics without modifying data.
Documented attack patterns abuse exactly the kind of access slow_query_analyzer gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Postgres Mcp Legacy, and nothing reaches the server without passing your rules. This is the rule we recommend for slow_query_analyzer:
{
"version": "1",
"default": "deny",
"tools": {
"slow_query_analyzer": {}
}
}slow_query_analyzer is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Analyze slow queries with optimization suggestions (requires pg_stat_statements). It is categorised as a Read tool in the Postgres Mcp Legacy MCP Server, which means it retrieves data without modifying state.
Register the Postgres Mcp Legacy MCP server in PolicyLayer and add a rule for slow_query_analyzer: 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 Mcp Legacy. Nothing to install.
slow_query_analyzer 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 slow_query_analyzer 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 slow_query_analyzer. 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.
slow_query_analyzer is provided by the Postgres Mcp Legacy MCP server (neverinfamous/postgres-mcp-legacy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Postgres Mcp Legacy, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
60 Postgres Mcp Legacy tools catalogued and risk-classified — across an index of 43,000+ MCP servers.