Loading ToolBench
Ableton Live integration through the Model Context Protocol
AbletonMCP has 15 tools with basic schemas and descriptions, but significant quality gaps. All tools have descriptions (10-50 chars, below the 50-200 char baseline for LLM optimization) and input schemas with type definitions. However, descriptions are generic and lack actionable context. No output schemas are documented. Error handling is minimal, tools return raw exceptions without recovery guidance. No tool annotations (readOnlyHint/destructiveHint) despite clear read/write distinction. Parameter descriptions are sparse (e.g., 'Index of the track' lacks context on valid ranges). No idempotency guidance for state-modifying operations. Tool composition is reasonable (single responsibility per tool), but missing chaining IDs in responses and no pagination support.
Add MIDI notes to a clip
Create a new audio track in the session
Create a new clip on a track
Create a new MIDI track in the session
Fire (play) a clip
Get information about the current Ableton Live session
Get information about a specific track in the session
No output schemas documented. LLMs cannot infer what fields each tool returns, forcing them to guess downstream data structure and breaking tool chaining.
Descriptions are 10-50 characters, well below the 50-200 char baseline for LLM optimization. Generic descriptions like 'Get information about a specific track in the session' lack actionable context (e.g., what fields are returned, when to use vs alternatives, prerequisites).
Inferred effective spec: <=2025-11-25.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 56 | <=2025-11-25 | v2 |
Load an instrument or effect on a track
Set the name of a clip
Set a parameter on a device
Set the tempo of the session
Set the name of a track
Start playback of the session
Stop a playing clip
Stop playback of the session
No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Risk metadata is tracked in the source but not exposed to the MCP client, preventing agents from reasoning about safety and retry behavior.
Parameter descriptions lack constraints and ranges. E.g., 'Index of the track' does not specify valid range, whether 0-indexed or 1-indexed, or what happens if index is out of bounds. LLMs cannot validate inputs without explicit constraints.
Error handling returns raw exceptions without recovery guidance. E.g., 'Connection to Ableton lost' tells the agent nothing about retry strategy, whether to ask the user, or if the operation is unrecoverable. No error classification (retryable vs fatal).