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

Annotations already declare readOnlyHint=true and openWorldHint=true, and the description adds no further behavioral context such as rate limits, data freshness, or result scope. The only added word is 'API', which conveys nothing operational.

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 a single short sentence with no padding, so nothing is wasted — but there is also essentially no content beyond the tool title. Brevity here reflects under-specification rather than efficiency.

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 an 8-parameter tool with no output schema, the description says nothing about what data comes back (video list fields, pagination limits, sort semantics) or how filtering by country/keyword/isCommercial interacts. An agent cannot predict the response shape or confidently choose this tool from the description alone.

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 100% and all 8 parameters (country, keyword, sort, pageSize, category, accountType, isCommercial) are documented in the schema itself. The description adds no syntax, defaults, or constraints beyond what the schema provides, 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 only restates the name and title: 'TikTok Commerce Intelligence CJ: videos/search API' names a vendor and an endpoint but adds no specific verb or resource explanation. It doesn't say what a videos/search returns or how it differs from siblings like nexscope_data_cj_videos_detail or nexscope_tiktok_video_search.

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 at all. With dozens of near-identical video/creator search siblings in the namespace, the agent gets no signal about preferring this CJ endpoint over nexscope_tiktok_video_search, nexscope_chuhaijiang_tiktok_video_search, or nexscope_data_cj_creators_related_videos.

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