broker_cleanup_idle

THE RISK

High Risk

This tool stops a running broker listener process. While it only acts when idle (no clients, runs, or pending commands), it triggers an external operational effect (stopping a service), placing it in the Execute category. Misuse could disrupt the WebSocket bridge communication infrastructure, hence medium severity.

From the tool's definition 'Stop the transient shared broker listener' — terminates an active runtime process/service

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

HOW TO CONTROL BROKER_CLEANUP_IDLE

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

policy.json

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

broker_cleanup_idle 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.

Create a free account and register Godot Devtool — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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High-risk tools in Godot Devtool → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
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FAQ

What does the broker_cleanup_idle tool do? +

Stop the transient shared broker listener only when no clients, runs, or pending commands require it. It is categorised as a Execute tool in the Godot Devtool MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on broker_cleanup_idle? +

Register the Godot Devtool MCP server in PolicyLayer and add a rule for broker_cleanup_idle: 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 Godot Devtool. Nothing to install.

What risk level is broker_cleanup_idle? +

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

Can I rate-limit broker_cleanup_idle? +

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

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

broker_cleanup_idle is provided by the Godot Devtool MCP server (wangdiandao/godot-devtool). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Godot Devtool tool call.

Deterministic rules across all 101 Godot Devtool tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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// WHAT BROKER_CLEANUP_IDLE ON GODOT DEVTOOL DOES

// THE RISK

// HOW TO CONTROL BROKER_CLEANUP_IDLE

// EXPLORE