find_valid_poi_location

THE RISK

Low Risk

Why find_valid_poi_location needs a policy

This tool performs a read-only search/query operation across the game world's terrain data to identify suitable locations. It has no side effects, does not execute code or external operations, and does not modify game state. The blast radius of misuse is minimal—an AI agent could only receive incorrect location suggestions, which would not break game mechanics or cause irreversible harm.

From the tool's definition The tool 'find_valid_poi_location' returns ranked candidates for locations without modifying any data. The verb 'find' and 'returns' indicate a query/retrieval operation.

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

POLICY

How to control find_valid_poi_location

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

policy.json

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

find_valid_poi_location 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 Rpg — 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 →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_valid_poi_location

What does the find_valid_poi_location tool do? +

Find terrain-valid locations for placing a POI/structure. Returns ranked candidates by suitability. It is categorised as a Read tool in the Rpg MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_valid_poi_location? +

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

What risk level is find_valid_poi_location? +

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

Can I rate-limit find_valid_poi_location? +

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

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

find_valid_poi_location is provided by the Rpg MCP server (mnehmos/mnehmos.rpg.mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Rpg tool call.

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

CHECK YOUR STACK →