Stop playing a clip. Parameters: - track_index: Track number (1-based). - clip_index: Clip slot number (1-based).
AI agents invoke stop_clip to trigger actions in Ableton MCP Extended. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
stop_clip executes a command that affects the playback state of Ableton Live, making it an Execute category tool rather than Read (which would only query state). While the action is reversible and low-impact (stopping playback can be undone by pressing play again), it represents triggering an external operation whose effects depend on the provided arguments.
From the tool's definition Tool performs action 'Stop playing a clip' which triggers an operation in Ableton Live with specific parameters (track_index, clip_index). This is an active control operation that changes the state of the DAW.
Documented attack patterns abuse exactly the kind of access stop_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 stop_clip:
{
"version": "1",
"default": "deny",
"tools": {
"stop_clip": {
"limits": [
{
"counter": "stop_clip_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}stop_clip stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Stop playing a clip. Parameters: - track_index: Track number (1-based). - clip_index: Clip slot number (1-based). It is categorised as a Execute tool in the Ableton MCP Extended MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Ableton MCP Extended MCP server in PolicyLayer and add a rule for stop_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.
stop_clip is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the stop_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 stop_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.
stop_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.