clo_shutdown · Clo3d MCP: Risk & Policy

WHAT IT DOES

What clo_shutdown does on Clo3d

AI agents invoke clo_shutdown to trigger actions in Clo3d. 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 clo_shutdown needs a policy

This tool terminates an active listener process within CLO3D, which is an external operation that affects the running state of the application. It doesn't delete data, but it disrupts the MCP session and transfers control back to the UI, potentially interrupting ongoing workflows. It's an Execute-category action because it triggers an external operational state change.

From the tool's definition Stop the in-CLO listener and hand control back to CLO's UI

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

clo_shutdown Rate-limited

clo_shutdown 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": {
    "clo_shutdown": {
      "limits": [
        {
          "counter": "clo_shutdown_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 Clo3d, so you can run agents against it safely.

FAQ

Questions about clo_shutdown

What does the clo_shutdown tool do? +

Stop the in-CLO listener and hand control back to CLO's UI. It is categorised as a Execute tool in the Clo3d MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on clo_shutdown? +

Register the Clo3d MCP server in PolicyLayer and add a rule for clo_shutdown: 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 Clo3d. Nothing to install.

What risk level is clo_shutdown? +

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

Can I rate-limit clo_shutdown? +

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

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

clo_shutdown is provided by the Clo3d MCP server (lilbonner/clo3d-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.