create_bassline · Ableton MCP: Risk & Policy

WHAT IT DOES

What create_bassline does on Ableton MCP

AI agents use create_bassline 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 create_bassline needs a policy

This tool creates new musical content (a bassline) within Ableton Live. It writes/generates new MIDI or pattern data into the project. This is reversible (the user can delete or undo the created bassline), placing it in the Write category. Severity is medium as misuse could alter the project's musical content but is not catastrophic.

From the tool's definition create_bassline / ベースラインを自動生成 (auto-generate a bassline)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_bassline Rate-limited

create_bassline 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": {
    "create_bassline": {
      "limits": [
        {
          "counter": "create_bassline_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 create_bassline

What does the create_bassline tool do? +

ベースラインを自動生成. 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 create_bassline? +

Register the Ableton MCP server in PolicyLayer and add a rule for create_bassline: 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 create_bassline? +

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

Can I rate-limit create_bassline? +

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

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

create_bassline 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.