set_parallel_playback_rate

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

No annotations are provided, so the description carries the full burden. It discloses that the rate is applied to each connected account and that separate results are retained, but it does not explain permissions, failure behavior when accounts are disconnected, reversibility, or what the separate results contain.

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 front-loaded sentence with no filler. Its brevity is appropriate, though the phrase 'retaining separate results' is vague enough that it could be clarified without adding much length.

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 mutation tool with one parameter, no annotations, and no output schema, the description is incomplete. It does not explain what playback rate means here, valid values, per-account behavior, or what happens when only some connected accounts can be updated.

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?

Schema description coverage is 0% for the single 'rate' parameter. The description calls it 'the user's requested rate' but adds no units, accepted range, format (e.g., 1.25x), or meaning of the default value 1.25, so it does not compensate for the missing schema documentation.

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 names an action ('Apply ... rate') and a target ('each connected account'), but it omits the key noun 'playback' and does not distinguish this tool from siblings like set_learning_batch_rate or set_owned_video_rate. The purpose is inferable from the tool name but not fully stated in the description itself.

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?

There is no explicit guidance on when to use this tool versus set_learning_batch_rate, set_owned_video_rate, or other rate-setting siblings. The phrase 'each connected account' implies a multi-account context, but no prerequisites, exclusions, or alternatives are stated.

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