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

No annotations are provided, so the description carries the full burden. It usefully discloses that the result is region/session-influenced and non-exhaustive, and that pagination is not supported. It does not state authentication needs, rate limits, or what happens if the category_id is invalid, so it is adequate but incomplete.

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?

Three tight sentences front-load the core action, then add scope and pagination caveats. Every sentence earns its place and there is no repetition or filler.

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 a simple two-parameter tool with no output schema and no annotations, the description covers the essential behavior: scope, dependency, and pagination limits. It could go further on error handling or auth, but it is otherwise complete for an agent to call this correctly.

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%, so the schema already documents both parameters. The description adds meaning by tying category_id to the explore_categories tool and by clarifying the non-exhaustive nature of count. Baseline 3 is appropriate because the schema does the heavy lifting and the description adds only moderate context.

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?

States a specific verb (Get), resource (TikTok Explore videos), and the dependency (category_id from explore_categories). An agent can distinguish this from search_videos or hashtag_videos because it is explicitly tied to the Explore feed and category IDs.

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?

It clearly frames this as a 'discovery sample' influenced by region/session and not an exhaustive ranking, which tells the agent when this is appropriate. However, it does not name a direct alternative for exhaustive ranking or general search, so it falls short of the 5-level explicit when-to-use-this-vs-alternative guidance.

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