pg_query_plan_compare

Compare execution plans of two SQL queries to identify performance differences.

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-query-plan-compare.md

WHAT IT DOES

What pg_query_plan_compare does on PostgreSQL MCP Server

AI agents call pg_query_plan_compare to retrieve information from PostgreSQL MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why pg_query_plan_compare is rated Low

The tool analyzes and compares query execution plans, which is an informational/diagnostic operation. It does not execute the queries themselves, modify data, delete anything, or commit financial transactions.

From the tool's definition Tool description states it 'Compare[s] execution plans of two SQL queries' — this is a read-only analysis operation that retrieves and examines query metadata without modifying or executing queries against live data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_query_plan_compare safely

PolicyLayer is an MCP gateway: it sits between your AI agents and PostgreSQL MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pg_query_plan_compare, this is the rule to start with:

pg_query_plan_compare Allowed

pg_query_plan_compare is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pg_query_plan_compare": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect PostgreSQL MCP Server, apply this rule, and every pg_query_plan_compare call is checked against it from then on.

FAQ

Questions about pg_query_plan_compare

What does the pg_query_plan_compare tool do? +

Compare execution plans of two SQL queries to identify performance differences. It is categorised as a Read tool in the PostgreSQL MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on pg_query_plan_compare? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_query_plan_compare: 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 PostgreSQL MCP Server. Nothing to install.

What risk level is pg_query_plan_compare? +

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

Can I rate-limit pg_query_plan_compare? +

Yes. Add a rate_limit block to the pg_query_plan_compare 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 pg_query_plan_compare completely? +

Set action: deny in the PolicyLayer policy for pg_query_plan_compare. 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 pg_query_plan_compare? +

pg_query_plan_compare is provided by the PostgreSQL MCP Server MCP server (@neverinfamous/postgres-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What pg_query_plan_compare does on PostgreSQL MCP Server

Why pg_query_plan_compare is rated Low

The rule that runs pg_query_plan_compare safely

Questions about pg_query_plan_compare

More on PostgreSQL MCP Server, and thousands of servers like it.