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 further — no mention of what the `include` expansion does to response size or cost, no note that the id must come from a prior search call, no latency or data-freshness context for an open-world external API.

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 sentence with no waste, but it is waste-free because it carries no information beyond the title. Brevity here reflects under-specification rather than disciplined concision.

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 3-parameter, open-world retrieval tool with no output schema, the description should convey what a 'creative detail' record contains (video assets, performance metrics, associated ad ids) and how the `include` flags change it. None of that is present, leaving the agent unable to predict the response or confirm the id source.

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%, so the schema documents all three parameters without description help; the per-parameter wording ('Ideas returned by idea search `id`', '`analysis`, `embedding`') is cryptic but is schema text, not description text. The description itself contributes zero parameter meaning, which lands at the baseline 3 for fully covered schemas.

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 simply restates the title verbatim: 'TikTok Commerce Intelligence CJ: ad creative/creatives/detail API.' It implies a detail/retrieval operation on ad creatives but never states what data it returns or how it differs from nexscope_data_cj_ad_creative_creatives_search or nexscope_data_cj_ad_creative_ads_detail, both of which share nearly identical naming.

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 guidance on when to call this versus the sibling creatives_search (which presumably produces the `id` this tool consumes) or ads_detail. The implicit detail-vs-search distinction is left entirely to inference from the tool name.

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