crow_gis_geocode

THE RISK

Low Risk

Why crow_gis_geocode needs a policy

This is a geocoding lookup service that retrieves geographic coordinates based on input addresses. It performs a query against mapping data and returns results without creating, modifying, or deleting any data. There are no irreversible effects, code execution, or financial implications.

From the tool's definition Tool description states it 'convert[s] an address or place name to latitude/longitude coordinates' using 'self-hosted Nominatim'.

Documented attack patterns abuse exactly the kind of access crow_gis_geocode gives an agent:

POLICY

How to control crow_gis_geocode

PolicyLayer is an MCP gateway — it sits between your AI agents and Crow, and nothing reaches the server without passing your rules. This is the rule we recommend for crow_gis_geocode:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "crow_gis_geocode": {}
  }
}

crow_gis_geocode is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Crow — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about crow_gis_geocode

What does the crow_gis_geocode tool do? +

Forward geocode: convert an address or place name to latitude/longitude coordinates. Uses self-hosted Nominatim (OpenStreetMap data). It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on crow_gis_geocode? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_gis_geocode: 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 Crow. Nothing to install.

What risk level is crow_gis_geocode? +

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

Can I rate-limit crow_gis_geocode? +

Yes. Add a rate_limit block to the crow_gis_geocode 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 crow_gis_geocode completely? +

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

crow_gis_geocode is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

Start from Crow, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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