pg_geometry_column

Add a geometry column to a table. Returns alreadyExists: true if column exists.

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-geometry-column.md

WHAT IT DOES

What pg_geometry_column does on PostgreSQL MCP Server

AI agents use pg_geometry_column 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_geometry_column is rated Medium

Adding a column to a table is a reversible Write operation. While schema changes can have broad effects (potentially affecting queries or dependent objects), the operation itself is not destructive—columns can be dropped and the change can be rolled back. The severity is medium because altering production table schemas can impact performance or dependent code, but the action itself is modifiable.

From the tool's definition Tool description states "Add a geometry column to a table", which is a schema modification operation that creates or alters table structure.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_geometry_column 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_geometry_column, this is the rule to start with:

pg_geometry_column Rate-limited

pg_geometry_column 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_geometry_column": {
      "limits": [
        {
          "counter": "pg_geometry_column_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_geometry_column call is checked against it from then on.

FAQ

Questions about pg_geometry_column

What does the pg_geometry_column tool do? +

Add a geometry column to a table. Returns alreadyExists: true if column exists. 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_geometry_column? +

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

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

Can I rate-limit pg_geometry_column? +

Yes. Add a rate_limit block to the pg_geometry_column 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_geometry_column completely? +

Set action: deny in the PolicyLayer policy for pg_geometry_column. 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_geometry_column? +

pg_geometry_column 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_geometry_column does on PostgreSQL MCP Server

Why pg_geometry_column is rated Medium

The rule that runs pg_geometry_column safely

Questions about pg_geometry_column

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