start_playback

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states 'Start playing' without detailing consequences such as whether playback resumes from the current position, if it conflicts with recording, or if it requires an existing session. This is a minimal behavioral description with no additional transparency.

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, concise sentence that directly states the tool's function. It is front-loaded with the verb 'Start' and contains no unnecessary words or repetition. This exemplifies appropriate conciseness for a simple action.

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 simplicity (no parameters, no output schema, straightforward action), the description is nearly complete. It conveys the essential operation. However, it lacks any nuance such as what state the session must be in or what happens if playback is already active, so it is not a 5.

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 tool has zero parameters, and the schema coverage is 100% (empty properties). Baseline for 0 params is 4, and there is no parameter meaning that needs explaining. The description adds nothing about parameters, which is acceptable since there are none.

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 'Start playing the Ableton session' clearly identifies the action (start) and the resource (Ableton session playback), distinguishing it from sibling tools like stop_playback and start_recording. It is specific and unambiguous.

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 explicit guidance on when to use this tool versus alternatives. It does not mention exclusions or prerequisites, and while the usage is implied for a basic transport action, the lack of any contextual notes leaves the agent without information about scenarios where this might be inappropriate (e.g., during recording).

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