run_applescript · Automator MCP: Risk & Policy

WHAT IT DOES

What run_applescript does on Automator

AI agents invoke run_applescript to trigger actions in Automator. 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_applescript needs a policy

run_applescript triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

run_applescript Rate-limited

run_applescript 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_applescript": {
      "limits": [
        {
          "counter": "run_applescript_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 Automator, so you can run agents against it safely.

FAQ

Questions about run_applescript

What does the run_applescript tool do? +

Execute AppleScript code on macOS. It is categorised as a Execute tool in the Automator 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_applescript? +

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

What risk level is run_applescript? +

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

Can I rate-limit run_applescript? +

Yes. Add a rate_limit block to the run_applescript 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_applescript completely? +

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

run_applescript is provided by the Automator MCP server (vetcoders/automator-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.