clip_set_envelope · Ableton Mind MCP: Risk & Policy

WHAT IT DOES

What clip_set_envelope does on Ableton Mind

AI agents use clip_set_envelope to create or update resources in Ableton Mind — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ableton Mind environment.

WHY IT NEEDS A POLICY

Why clip_set_envelope needs a policy

This tool creates or modifies automation envelope data within a clip—a reversible operation within Ableton Live's project file. While it affects audio production parameters, it does not execute arbitrary code, delete data irreversibly, or move financial resources.

From the tool's definition Tool description states 'Replace all automation points' and 'complete envelope rewrite', which modifies clip automation data. Returns 'written point count' confirming data mutation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

clip_set_envelope Rate-limited

clip_set_envelope stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "clip_set_envelope": {
      "limits": [
        {
          "counter": "clip_set_envelope_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Ableton Mind, so you can run agents against it safely.

FAQ

Questions about clip_set_envelope

What does the clip_set_envelope tool do? +

Replace all automation points for one clip envelope. Use when the user wants a complete envelope rewrite for mixer or device parameters. NOT idempotent for partial edits; returns written point count and verification diff after hold-curve expansion. It is categorised as a Write tool in the Ableton Mind MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on clip_set_envelope? +

Register the Ableton Mind MCP server in PolicyLayer and add a rule for clip_set_envelope: 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 Ableton Mind. Nothing to install.

What risk level is clip_set_envelope? +

clip_set_envelope is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit clip_set_envelope? +

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

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

clip_set_envelope is provided by the Ableton Mind MCP server (ableton-mind). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.