tdd_stop_watch · Promethean OS MCP: Risk & Policy

WHAT IT DOES

What tdd_stop_watch does on Promethean OS MCP

AI agents invoke tdd_stop_watch to trigger actions in Promethean OS MCP. 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 tdd_stop_watch needs a policy

This tool executes a command to stop/terminate a running process. While not destructive (data is not deleted or irreversibly modified), it is an Execute-category action because it triggers an external operation (process termination) whose effects depend on which watch process is running.

From the tool's definition Tool name 'tdd_stop_watch' and description 'Stop the running watch process' indicates termination of an active process/service.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tdd_stop_watch Rate-limited

tdd_stop_watch 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": {
    "tdd_stop_watch": {
      "limits": [
        {
          "counter": "tdd_stop_watch_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 Promethean OS MCP, so you can run agents against it safely.

FAQ

Questions about tdd_stop_watch

What does the tdd_stop_watch tool do? +

Stop the running watch process. It is categorised as a Execute tool in the Promethean OS MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on tdd_stop_watch? +

Register the Promethean OS MCP server in PolicyLayer and add a rule for tdd_stop_watch: 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 Promethean OS MCP. Nothing to install.

What risk level is tdd_stop_watch? +

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

Can I rate-limit tdd_stop_watch? +

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

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

tdd_stop_watch is provided by the Promethean OS MCP server (octave-commons/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.