Unfold (expand) a group track.
AI agents use unfold_track to create or update resources in Ableton — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ableton environment.
Unfolding a group track changes the session's UI state (expanded/collapsed view), which is a reversible modification. It does not delete data, execute code, or involve financial transactions. The blast radius is low as it only affects the display state of a track.
From the tool's definition Unfold (expand) a group track — this modifies the visual/UI state of a track in Ableton Live by expanding it
Documented attack patterns abuse exactly the kind of access unfold_track gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ableton, and nothing reaches the server without passing your rules. This is the rule we recommend for unfold_track:
{
"version": "1",
"default": "deny",
"tools": {
"unfold_track": {
"limits": [
{
"counter": "unfold_track_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}unfold_track 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.
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Unfold (expand) a group track. It is categorised as a Write tool in the Ableton MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ableton MCP server in PolicyLayer and add a rule for unfold_track: 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. Nothing to install.
unfold_track 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 unfold_track 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 unfold_track. 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.
unfold_track is provided by the Ableton MCP server (jpoindexter/ableton-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ableton, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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