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

No annotations are provided, so the description carries the full behavioral burden. It discloses what data categories are returned, but says nothing about whether the ID must come from a search tool first, whether missing IDs error or return null, or response shape. Users won't know if this is a cacheable read or a live scrape.

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?

One compact sentence, front-loaded with the tool's category tag, then the action and payloads. No 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?

A single-ID lookup tool with no annotations, no output schema, and 0% param coverage needs more than this. It should explain ID provenance, behavior on not-found, and a sample 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?

Schema description coverage is 0% and the description gives no information about the 'id' parameter — not its format, source, or whether it must come from toys__search_toys. With one required parameter and no schema help, the description should compensate but does not.

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 (取得/get) and resource (單一商品/single product) with clear scope, and lists the three payloads it returns (details, stock reports, discussions). It is distinguishable from siblings like toys__search_toys and toys__latest_toy_news, though it doesn't name them directly.

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 use this versus toys__search_toys, toys__latest_toy_news, or toys__list_trades. The ID-based lookup is implied by the single required 'id' param, but the description never says so explicitly.

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