bilibili_my_watch_later

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint, so the safety profile is covered. The description adds the account-scoped '[账号]' cue, implying credentials are needed, but does not mention pagination, result ordering, or what the returned list contains.

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 short sentence with the account marker front-loaded and no filler. It is appropriately sized for a simple zero-parameter read tool.

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 zero-parameter read operation with rich annotations, the definition is minimally sufficient. However, with no output schema, it does not describe the shape of the returned Watch Later list or whether results are paginated, leaving an agent to discover the response format at call time.

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?

The tool takes zero parameters, so there is no parameter semantics to explain. The baseline of 4 is appropriate because the empty schema is self-evident and the description does not need to document inputs.

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 (读取) and resource (稍后再看列表) with the scope 本人, which clearly identifies a personal Watch Later listing rather than a video search. It does not explicitly name the Add/Delete siblings, but the read-only nature makes the distinction reasonably clear.

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 guidance on when to use this versus alternatives such as bilibili_watch_later_add/delete or bilibili_my_history. The '本人' scope implies personal use but no exclusions or conditions are stated.

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