AbletonMCP

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Set the tempo' implies a write operation that likely changes the session state, but it doesn't specify whether this requires specific permissions, if the change is immediate or reversible, what happens to playback during the change, or if there are rate limits. For a mutation tool with zero annotation coverage, this leaves critical behavioral aspects unclear.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, direct sentence with zero wasted words. It front-loads the core action and resource, making it immediately scannable and efficient. Every word earns its place by conveying essential purpose without redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity as a mutation operation with no annotations, 0% schema coverage, and no output schema, the description is insufficiently complete. It lacks details on behavioral traits (e.g., side effects, error conditions), parameter constraints (e.g., tempo range), and expected outcomes. For a tool that modifies session state, more context is needed to ensure safe and correct usage.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description mentions 'tempo' as the resource, which aligns with the single parameter 'tempo' in the schema. However, with 0% schema description coverage, the schema provides no details about the tempo parameter (e.g., valid range, units like BPM). The description adds minimal semantic context by implying tempo is a numeric value to set, but it doesn't compensate for the coverage gap with specifics like acceptable values or effects.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Set') and the resource ('tempo of the Ableton session'), making the purpose immediately understandable. It distinguishes from siblings like 'start_playback_tool' or 'get_session_info_tool' by focusing on tempo modification rather than playback control or information retrieval. However, it doesn't explicitly differentiate from other tempo-related tools (none exist in the sibling list), so it falls short of a perfect 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., whether Ableton must be running), exclusions (e.g., not usable during playback), or related tools for tempo queries. Without any usage context, the agent must infer timing from the tool name alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.