advance_turn · ChatRPG MCP: Risk & Policy

WHAT IT DOES

What advance_turn does on ChatRPG

AI agents use advance_turn 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 advance_turn needs a policy

This tool modifies the state of an ongoing encounter by moving to the next turn in the initiative order. It is a reversible state change (the encounter can continue progressing or be ended), with no destructive, financial, or code-execution implications. It writes/updates game state rather than just reading it.

From the tool's definition Advance to the next combatant

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

advance_turn Rate-limited

advance_turn 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": {
    "advance_turn": {
      "limits": [
        {
          "counter": "advance_turn_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 advance_turn

What does the advance_turn tool do? +

Advance to the next combatant\. 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 advance_turn? +

Register the ChatRPG MCP server in PolicyLayer and add a rule for advance_turn: 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 advance_turn? +

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

Can I rate-limit advance_turn? +

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

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

advance_turn 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.