pg_stats_summary

Get summary statistics (count, avg, min, max, stddev) for multiple numeric columns. Defaults to all numeric columns if none specified.

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-stats-summary.md

WHAT IT DOES

What pg_stats_summary does on PostgreSQL MCP Server

AI agents call pg_stats_summary 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_stats_summary is rated Low

This tool queries and returns aggregate statistics from numeric columns without creating, modifying, deleting, executing external operations, or affecting financial data. It is a straightforward read operation with minimal blast radius if misused—an AI agent could retrieve statistics about any column but cannot alter data or execute arbitrary code.

From the tool's definition Tool retrieves summary statistics (count, avg, min, max, stddev) for numeric columns with no modification or deletion capability described. The verb 'Get' and the read-only statistical aggregation functions indicate data retrieval only.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_stats_summary 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_stats_summary, this is the rule to start with:

pg_stats_summary Allowed

pg_stats_summary 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_stats_summary": {}
  }
}

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_stats_summary call is checked against it from then on.

FAQ

Questions about pg_stats_summary

What does the pg_stats_summary tool do? +

Get summary statistics (count, avg, min, max, stddev) for multiple numeric columns. Defaults to all numeric columns if none specified. 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_stats_summary? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_stats_summary: 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_stats_summary? +

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

Can I rate-limit pg_stats_summary? +

Yes. Add a rate_limit block to the pg_stats_summary 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_stats_summary completely? +

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

pg_stats_summary 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_stats_summary does on PostgreSQL MCP Server

Why pg_stats_summary is rated Low

The rule that runs pg_stats_summary safely

Questions about pg_stats_summary

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