simulate_playthrough · Ice Puzzle MCP: Risk & Policy

WHAT IT DOES

What simulate_playthrough does on Ice Puzzle

AI agents invoke simulate_playthrough to trigger actions in Ice Puzzle. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why simulate_playthrough needs a policy

This tool executes a simulation by running a sequence of moves through the game engine. It triggers an external computation/operation rather than simply reading static data. The results depend on the move arguments provided. No persistent data is modified, but it actively runs a process, placing it in Execute rather than Read.

From the tool's definition Simulate a full sequence of moves

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

simulate_playthrough Rate-limited

simulate_playthrough stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "simulate_playthrough": {
      "limits": [
        {
          "counter": "simulate_playthrough_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about simulate_playthrough

What does the simulate_playthrough tool do? +

Simulate a full sequence of moves. It is categorised as a Execute tool in the Ice Puzzle MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on simulate_playthrough? +

Register the Ice Puzzle MCP server in PolicyLayer and add a rule for simulate_playthrough: 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 Ice Puzzle. Nothing to install.

What risk level is simulate_playthrough? +

simulate_playthrough is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit simulate_playthrough? +

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

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

simulate_playthrough is provided by the Ice Puzzle MCP server (wmoten/ice-puzzle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.