pg_create_index

Create an index on a table. Supports btree, hash, gin, gist, brin index types.

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-create-index.md

WHAT IT DOES

What pg_create_index does on PostgreSQL MCP Server

AI agents use pg_create_index to create or update resources in PostgreSQL MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PostgreSQL MCP Server environment.

RISK

Why pg_create_index is rated Medium

Creating an index is a reversible Write operation—it modifies the database schema but the index can be dropped without affecting data integrity. While it affects query performance and consumes disk space, it is not destructive (data is not deleted or irreversibly lost) and not Execute (no arbitrary code execution).

From the tool's definition Tool name is 'pg_create_index' and description states 'Create an index on a table.' The verb 'Create' indicates a write operation that modifies database schema by adding a new index structure.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_create_index 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_create_index, this is the rule to start with:

pg_create_index Rate-limited

pg_create_index stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pg_create_index": {
      "limits": [
        {
          "counter": "pg_create_index_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT 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_create_index call is checked against it from then on.

FAQ

Questions about pg_create_index

What does the pg_create_index tool do? +

Create an index on a table. Supports btree, hash, gin, gist, brin index types. It is categorised as a Write tool in the PostgreSQL MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pg_create_index? +

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

pg_create_index is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit pg_create_index? +

Yes. Add a rate_limit block to the pg_create_index 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_create_index completely? +

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

pg_create_index 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_create_index does on PostgreSQL MCP Server

Why pg_create_index is rated Medium

The rule that runs pg_create_index safely

Questions about pg_create_index

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