add_caption_track

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

No annotations are provided, so the description carries the full behavioral burden. It reveals only that the target is the active sequence; it does not address what happens if the track already exists, whether an active sequence is required, failure behavior, permissions, or any side effects of adding a track.

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. It states the action and target immediately and wastes no words.

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?

The tool is a simple mutation with one optional enum parameter and no output schema. The description adequately states the main action, but without annotations it should do more to explain usage distinctions and behavioral expectations. It is minimum viable rather than complete.

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 100%, so the single optional format parameter and its enum values are already fully documented in the schema. The description adds no additional parameter semantics, which is consistent with the baseline 3 under high schema coverage.

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 gives a specific verb and resource: 'Add a new caption/subtitle track' and scopes it to 'the active sequence.' It is clear what the tool does, though it does not explicitly distinguish itself from sibling tools like add_caption or add_caption_sequence.

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 states the action but gives no guidance on when to choose it over related tools such as add_caption, import_captions, or add_caption_sequence. There are no exclusions or prerequisite notes beyond the implied requirement of an active sequence.

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