whale_subtitles

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

Annotations already establish readOnly=true, openWorld=true, and destructive=false, so the description does not need to repeat safety basics. It adds meaningful context by stating that login is required and that returned transcripts include timestamps, though it does not cover error behavior or whether subtitles may be unavailable.

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 wasted text. The action, output trait, and login prerequisite all appear immediately.

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 simple read-only tool with annotations and no output schema, the description covers the core action, timestamps, and login prerequisite. However, it omits the meaning of the sole required parameter and does not clarify transcript format or availability constraints, leaving a notable gap for invocation.

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%, and the only required parameter, bvid, is not explained at all in the description. The schema provides type and a regex pattern, but the description adds no meaning about what bvid identifies or how it relates to the requested subtitle transcript.

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 states a clear verb and resource ('Read official subtitle transcript') plus a useful scope qualifier ('official') and output trait ('with timestamps'). It does not explicitly distinguish the tool from siblings like whale_video, but the subtitle-transcript focus is specific enough for an agent to understand what it does.

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 phrase 'requires login' provides an important prerequisite, but the description gives no explicit when-to-use guidance, exclusions, or alternatives such as whale_video for video metadata versus whale_subtitles for transcripts. Usage is implied by the name and purpose rather than stated as selection guidance.

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