add_filter_sweep · Ableton MCP: Risk & Policy

WHAT IT DOES

What add_filter_sweep does on Ableton MCP

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

WHY IT NEEDS A POLICY

Why add_filter_sweep needs a policy

This tool creates/adds automation data for a filter sweep effect in Ableton Live. It modifies the project state by writing automation curves for the Auto Filter frequency parameter. This is reversible (automation can be removed), so it falls under Write rather than Destructive. Misuse could alter a project's sound design unintentionally, giving it medium severity.

From the tool's definition フィルタースイープを追加（Auto Filterの周波数を自動変化）— 'adds' a filter sweep by automating Auto Filter frequency changes

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_filter_sweep Rate-limited

add_filter_sweep 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": {
    "add_filter_sweep": {
      "limits": [
        {
          "counter": "add_filter_sweep_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 MCP, so you can run agents against it safely.

FAQ

Questions about add_filter_sweep

What does the add_filter_sweep tool do? +

フィルタースイープを追加（Auto Filterの周波数を自動変化）. It is categorised as a Write tool in the Ableton MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_filter_sweep? +

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

What risk level is add_filter_sweep? +

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

Can I rate-limit add_filter_sweep? +

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

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

add_filter_sweep is provided by the Ableton MCP server (keigotak/abletonmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.