bilibili_must_watch

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

With no annotations, the description carries the full burden of behavioral disclosure. It does reveal the return structure ('separated into established classics and the latest additions') and implies a read-only operation through 'Get' and 'Returns'. It does not mention permissions, pagination, content language, or output field details, but for a parameterless getter it provides meaningful behavioral insight.

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 two sentences and front-loaded with the core purpose. It repeats 'Bilibili's curated must-watch' in both sentences, which is slightly redundant, but it stays informative and avoids filler. The structure is adequate, not overlong.

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?

Given the 0-parameter, no-annotation, no-output-schema context, the description covers the essence: what resource is pulled and how the result is separated. However, it doesn't describe the contents of each entry (e.g., title, URL, metadata), which might be expected when an output schema is absent. It is sufficient to invoke the tool, but leaves some ambiguity about the response shape.

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 input schema is empty with zero parameters, so the baseline is 4. The description cannot add parameter meaning beyond what the schema already provides, and there are no parameters to document. No additional considerations are needed.

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 specific verb ('Get') and resource ('Bilibili's curated must-watch videos'), and adds that the collection is split into established classics and the latest additions. This clearly communicates the main function. However, it does not explicitly differentiate from closely related sibling tools like bilibili_popular or bilibili_ranking, so it misses the extra deliberate sibling disambiguation.

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 the usage context through 'curated must-watch videos', but gives no explicit when-to-use or when-not-to-use guidance. It doesn't mention alternatives or exclude other Bilibili tools such as bilibili_popular or bilibili_weekly. This is implied usage rather than a directed guideline.

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