stop_playback

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

With no annotations, the description carries the full burden and does real work: it discloses undo scoping ('one undo-scoped command'), the observed return value, and a failure condition ('Live can reject the call while shutting down'). It stops short of stating idempotency or permission/auth requirements, but this is strong disclosure for a simple transport action.

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?

Front-loaded purpose followed by labeled 'Side effects', 'Example', and 'Edge cases' sections, which scan well. Slightly padded: the 'Example' line is really a return-value note rather than an example, a minor structural inconsistency.

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?

For a zero-parameter, no-output-schema tool, the description covers purpose, side effect, return observation, and an error edge case. The one notable gap is the absence of any usage/routing context relative to start_playback, but otherwise an agent has what it needs to call it correctly.

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 schema is empty (0 parameters), so the baseline of 4 applies and there are no parameters for the description to clarify. No missing parameter meaning to compensate for.

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?

States a specific verb+resource ('Stop Live's transport'), which is unambiguous and directly distinguishes it from the sibling start_playback. An agent can select this tool confidently without opening the schema.

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?

No when-to-use guidance and no reference to the obvious alternative start_playback or any prerequisite context. The only implicit cue is the verb itself; nothing routes the agent between stopping and starting playback or explains sequencing.

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