pg_spatial_index

Create a GiST spatial index for geometry column. Uses IF NOT EXISTS to avoid errors on duplicate names.

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-spatial-index.md

WHAT IT DOES

What pg_spatial_index does on PostgreSQL MCP Server

AI agents use pg_spatial_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_spatial_index is rated Medium

Creating an index is a reversible write operation that alters database schema but does not delete data or execute arbitrary code. It can be undone via DROP INDEX. While it may affect performance and is a structural change, it is not destructive (reversible), not execution of arbitrary operations (specific index creation), and not financial.

From the tool's definition "Create a GiST spatial index for geometry column" — the verb 'Create' and the action of building a database index constitutes a modification to the database schema.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_spatial_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_spatial_index, this is the rule to start with:

pg_spatial_index Rate-limited

pg_spatial_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_spatial_index": {
      "limits": [
        {
          "counter": "pg_spatial_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_spatial_index call is checked against it from then on.

FAQ

Questions about pg_spatial_index

What does the pg_spatial_index tool do? +

Create a GiST spatial index for geometry column. Uses IF NOT EXISTS to avoid errors on duplicate names. 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_spatial_index? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_spatial_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_spatial_index? +

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

Can I rate-limit pg_spatial_index? +

Yes. Add a rate_limit block to the pg_spatial_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_spatial_index completely? +

Set action: deny in the PolicyLayer policy for pg_spatial_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_spatial_index? +

pg_spatial_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_spatial_index does on PostgreSQL MCP Server

Why pg_spatial_index is rated Medium

The rule that runs pg_spatial_index safely

Questions about pg_spatial_index

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