create_caption_track

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

The description discloses that the tool creates a track (a write operation), which aligns with the annotations (readOnlyHint=false). However, it does not mention side effects, reversibility, or prerequisites beyond the imported file. With sparse annotations, the description could add more context.

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 sentence of 16 words that is front-loaded with the verb and object. No redundant information.

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 description covers the basic usage scenario but does not address potential edge cases (e.g., existing tracks, track naming, or format behavior). With three parameters and no output schema, more details on the caption_format options would improve completeness.

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 baseline is 3. The description adds context for the item_id parameter by mentioning imported caption files, but does not elaborate on start_seconds or caption_format beyond what the schema already provides.

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 clearly states the action ('Create'), the resource ('caption/subtitle track in the active sequence'), and the input type ('imported caption file'). It distinguishes from sibling tools, as no other tool deals with caption tracks.

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 implies when to use (when you have an imported caption file) and provides examples (.srt, .vtt), but does not explicitly state when not to use or mention alternatives. Sibling tools do not include caption-specific alternatives.

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