pg_stats_hypothesis

Perform one-sample t-test or z-test against a hypothesized mean. For z-test, provide populationStdDev (sigma) for accurate results. Use groupBy to test each group separately.

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-hypothesis.md

WHAT IT DOES

What pg_stats_hypothesis does on PostgreSQL MCP Server

AI agents call pg_stats_hypothesis 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_hypothesis is rated Low

This tool retrieves and analyzes statistical data to test hypotheses. It computes test statistics and results but does not create, modify, delete, or execute external operations. The optional groupBy parameter allows segmentation of analysis but remains a read operation. No side effects or data mutation occurs.

From the tool's definition Tool performs statistical hypothesis testing (t-test/z-test) on data; 'Perform one-sample t-test or z-test against a hypothesized mean' indicates read-only data analysis without modification or execution of arbitrary code.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_stats_hypothesis 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_hypothesis, this is the rule to start with:

pg_stats_hypothesis Allowed

pg_stats_hypothesis 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_hypothesis": {}
  }
}

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_hypothesis call is checked against it from then on.

FAQ

Questions about pg_stats_hypothesis

What does the pg_stats_hypothesis tool do? +

Perform one-sample t-test or z-test against a hypothesized mean. For z-test, provide populationStdDev (sigma) for accurate results. Use groupBy to test each group separately. 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_hypothesis? +

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

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

Can I rate-limit pg_stats_hypothesis? +

Yes. Add a rate_limit block to the pg_stats_hypothesis 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_hypothesis completely? +

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

pg_stats_hypothesis 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_hypothesis does on PostgreSQL MCP Server

Why pg_stats_hypothesis is rated Low

The rule that runs pg_stats_hypothesis safely

Questions about pg_stats_hypothesis

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