move_party · ChatRPG MCP: Risk & Policy

WHAT IT DOES

What move_party does on ChatRPG

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

WHY IT NEEDS A POLICY

Why move_party needs a policy

This tool modifies game state (party location and travel history) but does so reversibly and with no destructive consequences. Moving the party to a different location or undoing that action causes no permanent loss of data or resources.

From the tool's definition Tool performs state-modifying operations: 'move' changes party location; 'status' and 'history' are read-only queries. The move operation creates travel history records and updates party position state, making it a reversible data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

move_party Rate-limited

move_party 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": {
    "move_party": {
      "limits": [
        {
          "counter": "move_party_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 ChatRPG, so you can run agents against it safely.

FAQ

Questions about move_party

What does the move_party tool do? +

Move the party between connected locations. Operations: move (travel to connected location), status (show current location and exits), history (show travel history). Validates connections, handles locked/hidden passages, one-way paths, and tracks travel history. It is categorised as a Write tool in the ChatRPG MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on move_party? +

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

What risk level is move_party? +

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

Can I rate-limit move_party? +

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

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

move_party is provided by the ChatRPG MCP server (mnehmos/mnehmos.chatrpg.game). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.