Add MIDI notes to a clip. Parameters: - track_index: Track number (1-based). - clip_index: Clip slot number (1-based). - notes: List of note dictionaries, each with pitch, start_time, duration, velocity, and mute.
AI agents use add_notes_to_clip to create or update resources in Ableton MCP Extended — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ableton MCP Extended environment.
Adding MIDI notes is a write operation: it modifies clip content but does not delete or destroy data (reversible via undo or deletion). While Ableton Live is a creative tool, an AI agent misusing this could add unwanted notes to many clips, requiring manual correction. The impact is moderate—annoying but recoverable.
From the tool's definition Tool description states 'Add MIDI notes to a clip' with parameters for pitch, start_time, duration, velocity, and mute. This creates or modifies MIDI data within a clip—a reversible operation.
Documented attack patterns abuse exactly the kind of access add_notes_to_clip gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ableton MCP Extended, and nothing reaches the server without passing your rules. This is the rule we recommend for add_notes_to_clip:
{
"version": "1",
"default": "deny",
"tools": {
"add_notes_to_clip": {
"limits": [
{
"counter": "add_notes_to_clip_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_notes_to_clip 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.
Free to start. No card required.
Add MIDI notes to a clip. Parameters: - track_index: Track number (1-based). - clip_index: Clip slot number (1-based). - notes: List of note dictionaries, each with pitch, start_time, duration, velocity, and mute. It is categorised as a Write tool in the Ableton MCP Extended MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ableton MCP Extended MCP server in PolicyLayer and add a rule for add_notes_to_clip: 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 Extended. Nothing to install.
add_notes_to_clip is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the add_notes_to_clip 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.
Set action: deny in the PolicyLayer policy for add_notes_to_clip. 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.
add_notes_to_clip is provided by the Ableton MCP Extended MCP server (uisato/ableton-mcp-extended). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 46 Ableton MCP Extended tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
46 Ableton MCP Extended tools catalogued and risk-classified — across an index of 42,500+ MCP servers.