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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds nothing beyond that — no note on data freshness, site/country scope, rate limits, or what the 'detail' payload contains. It does not contradict the annotations.

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?

It is short, but shortness here is under-specification rather than economy — a single fragment that duplicates the title and front-loads nothing an agent needs. Brevity that adds no information does not earn conciseness credit.

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?

Three parameters, two of them required, and no output schema — the description should at least explain what a video detail record contains or how country and include interact. Given the crowded TikTok sibling namespace, this leaves the agent without enough to call the tool confidently.

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 id, country, and include are each documented in the schema itself. The description contributes no additional meaning (e.g., valid country codes, when include=core matters), so the baseline 3 applies.

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 restates the title verbatim ('TikTok Commerce Intelligence CJ: videos/detail API') without a verb or resource explanation. An agent can infer it fetches detail for a single TikTok video in the CJ dataset, but nothing distinguishes it from nexscope_data_cj_videos_search, nexscope_data_cj_videos_reviews, or the several other '*_video_detail' tools in the sibling list.

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?

No when-to-use guidance, no prerequisites, and no mention of alternatives. With siblings like nexscope_data_cj_videos_search and nexscope_chuhaijiang_tiktok_video_detail available, the agent has no basis in the description for choosing this tool.

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