run_map_check · Unreal MCP: Risk & Policy

WHAT IT DOES

What run_map_check does on Unreal

AI agents invoke run_map_check to trigger actions in Unreal. 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 run_map_check needs a policy

This tool executes a validation routine (Map Check) that performs analysis and reporting on the current level state. While Map Check itself is non-destructive and intended for diagnostics, it qualifies as Execute because it triggers an external operation whose behavior and side effects depend on the current level state.

From the tool's definition The tool is named 'run_map_check' and described as 'Run Map Check validation on the current level.' The verb 'run' indicates execution of a built-in validation process within Unreal Engine that analyzes the current level for errors and inconsistencies.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

run_map_check Rate-limited

run_map_check 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": {
    "run_map_check": {
      "limits": [
        {
          "counter": "run_map_check_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 Unreal, so you can run agents against it safely.

FAQ

Questions about run_map_check

What does the run_map_check tool do? +

Run Map Check validation on the current level. It is categorised as a Execute tool in the Unreal MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on run_map_check? +

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

What risk level is run_map_check? +

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

Can I rate-limit run_map_check? +

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

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

run_map_check is provided by the Unreal MCP server (sam-david/unreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.