set_ncfa_cookie · GeoGuessr MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_ncfa_cookie does on GeoGuessr MCP Server

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

WHY IT NEEDS A POLICY

Why set_ncfa_cookie needs a policy

The tool modifies client state by setting a cookie, which is a reversible Write operation. Without a description, confidence is reduced. If this cookie controls authentication or authorization, misuse could escalate impact. Severity is medium because cookie manipulation could enable unauthorized access or session hijacking, but the effect depends on implementation details not visible here.

From the tool's definition Tool name 'set_ncfa_cookie' indicates writing/setting authentication or session state. No description provided, limiting certainty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_ncfa_cookie Rate-limited

set_ncfa_cookie 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": {
    "set_ncfa_cookie": {
      "limits": [
        {
          "counter": "set_ncfa_cookie_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches GeoGuessr MCP Server, so you can run agents against it safely.

FAQ

Questions about set_ncfa_cookie

What does the set_ncfa_cookie tool do? +

set_ncfa_cookie. It is categorised as a Write tool in the GeoGuessr 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 set_ncfa_cookie? +

Register the GeoGuessr MCP Server MCP server in PolicyLayer and add a rule for set_ncfa_cookie: 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 GeoGuessr MCP Server. Nothing to install.

What risk level is set_ncfa_cookie? +

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

Can I rate-limit set_ncfa_cookie? +

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

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

set_ncfa_cookie is provided by the GeoGuessr MCP Server MCP server (nyxiumyuuki/geoguessrmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.