watch_run_now · Musubix MCP: Risk & Policy

WHAT IT DOES

What watch_run_now does on Musubix

AI agents invoke watch_run_now to trigger actions in Musubix. 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 watch_run_now needs a policy

This tool executes tasks on files immediately on demand. It triggers external operations whose effects depend on the arguments (which tasks, which files). This is an Execute-category action. Severity is medium because misuse could run unintended tasks on arbitrary files, but the description doesn't indicate destructive or financial impact.

From the tool's definition "Run specified tasks immediately on given files without waiting for changes"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

watch_run_now Rate-limited

watch_run_now 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": {
    "watch_run_now": {
      "limits": [
        {
          "counter": "watch_run_now_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 Musubix, so you can run agents against it safely.

FAQ

Questions about watch_run_now

What does the watch_run_now tool do? +

Run specified tasks immediately on given files without waiting for changes. It is categorised as a Execute tool in the Musubix MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on watch_run_now? +

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

What risk level is watch_run_now? +

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

Can I rate-limit watch_run_now? +

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

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

watch_run_now is provided by the Musubix MCP server (@nahisaho/musubix-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.