pg_hybrid_search

Combined vector similarity and full-text search with weighted scoring.

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-hybrid-search.md

WHAT IT DOES

What pg_hybrid_search does on PostgreSQL MCP Server

AI agents call pg_hybrid_search 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_hybrid_search is rated Low

The tool executes a search query combining vector and full-text search methods. While it performs a database query (Execute-like in nature), it is fundamentally a retrieval operation with no data modification, deletion, or side effects beyond returning results.

From the tool's definition Tool description states 'Combined vector similarity and full-text search with weighted scoring' — this performs search operations on existing data with no modification capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_hybrid_search 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_hybrid_search, this is the rule to start with:

pg_hybrid_search Allowed

pg_hybrid_search 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_hybrid_search": {}
  }
}

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_hybrid_search call is checked against it from then on.

FAQ

Questions about pg_hybrid_search

What does the pg_hybrid_search tool do? +

Combined vector similarity and full-text search with weighted scoring. 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_hybrid_search? +

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

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

Can I rate-limit pg_hybrid_search? +

Yes. Add a rate_limit block to the pg_hybrid_search 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_hybrid_search completely? +

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

pg_hybrid_search 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_hybrid_search does on PostgreSQL MCP Server

Why pg_hybrid_search is rated Low

The rule that runs pg_hybrid_search safely

Questions about pg_hybrid_search

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