Set the volume of a return track.
AI agents use set_return_volume 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.
The tool modifies audio mixer state (return track volume) which is a core music production parameter. This is a Write operation because it creates or modifies data reversibly—volume settings can be changed back, undone via Ctrl+Z, or saved/loaded from different session states.
From the tool's definition Tool name 'set_return_volume' and description 'Set the volume of a return track' indicate modification of track parameters. This is reversible configuration change within an Ableton Live session.
Documented attack patterns abuse exactly the kind of access set_return_volume 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_volume:
{
"version": "1",
"default": "deny",
"tools": {
"set_return_volume": {
"limits": [
{
"counter": "set_return_volume_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_return_volume 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 volume 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_volume: 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_volume 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_volume 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_volume. 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_volume 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.
128 Ableton tools catalogued and risk-classified — across an index of 43,000+ MCP servers.