Set the panning of a return track.
AI agents use set_return_pan 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.
This tool modifies audio engineering parameters (pan position) on a return track in Ableton Live. It is reversible—panning can be adjusted again to different values—so it qualifies as Write rather than Destructive. The severity is medium because incorrect pan settings could affect audio output quality and mix integrity, but the change is non-destructive and easily correctable.
From the tool's definition Tool name 'set_return_pan' and description 'Set the panning of a return track' indicate the tool modifies audio track parameters.
Documented attack patterns abuse exactly the kind of access set_return_pan 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 set_return_pan:
{
"version": "1",
"default": "deny",
"tools": {
"set_return_pan": {
"limits": [
{
"counter": "set_return_pan_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_return_pan 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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Set the panning of a return 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 set_return_pan: 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.
set_return_pan 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 set_return_pan 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 set_return_pan. 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.
set_return_pan 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.
Free to start. No card required.
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