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

No annotations are provided, so the description carries the burden. It usefully discloses what the results contain (發售／出貨日、價格與官方連結), but says nothing about read-only nature, data freshness, pagination, rate limits, or coverage gaps beyond the listed regions and brands.

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 dense sentence with the resource and scope front-loaded after the bracketed tag, and nothing is padding. The brand enumeration is somewhat list-like but still informative rather than wasteful.

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 three-parameter, all-optional query tool with no output schema and no annotations, the description covers scope, brands, regions, and return content adequately. It falls short on disambiguating from the near-identical toys__release_calendar sibling, which is the main thing an agent needs here.

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 each parameter (kind, zone, month) is fully documented in-schema, so the baseline is 3. The description's mention of regions and product categories loosely mirrors the zone and kind enums but adds no new syntax or default behavior beyond what the schema already states.

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 names a specific resource (全球玩具、模型、公仔、娃娃官方發售表), its scope (亞洲・美國・歐洲) and the brands covered, so it is clear what the tool returns. However, it never distinguishes itself from the closely-named sibling toys__release_calendar, leaving the agent unable to tell the two apart from the text alone.

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?

There is no explicit when-to-use or when-not-to-use guidance, and no alternatives are named. The '[NEW玩具情報站]' tag hints at a source but gives the agent no condition for selecting this tool over toys__release_calendar, toys__official_toy_news, or toys__latest_toy_news.

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