get_captions

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

No annotations exist, so the description carries the full burden, and it discloses almost nothing beyond the read intent: no return shape (do segments include timing, text, ids?), no behavior for an out-of-range or missing track index, no pagination or size expectations. For a read tool with zero annotation coverage this is thin.

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?

A single front-loaded sentence with no filler or redundancy. It is efficient, though the brevity is more a product of omission than of disciplined editing.

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 simple (one optional param, no output schema, no annotations), but the description leaves the agent without the shape of returned caption segments or what an empty track returns. Given how little structured metadata exists here, the description should have done more.

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 coverage is 100% and the schema already documents trackIndex with its default of 0. The description's phrase 'from a caption track' corroborates that the parameter selects the track but adds no indexing or format detail beyond the schema, so baseline 3 applies.

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?

Specific verb ('Get') and resource ('all caption segments from a caption track'), which clearly separates it from get_caption_tracks, add_caption, or update_caption. It does not explicitly name a sibling, so it stops short of a 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?

There is no statement of when to use this versus get_caption_tracks, export_captions, or transcribe_sequence, and no prerequisites such as needing a valid track index. The only usage signal is implied by the wording 'from a caption track'.

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