run_yahoo_auctions_categories

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

No annotations, so the description carries the burden. It usefully discloses the returned fields (id, Japanese name, URL, parent id) and a cost signal (5 points per returned record), which is real behavioral context. However it omits auth/permission needs, rate limits, and error behavior for an unannotated tool.

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 dense sentence with the traversal rule and the return shape front-loaded. No filler; every clause conveys actionable information.

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?

With no output schema, the description compensates by listing the returned fields, and it explains the parent-id/0 traversal mechanic for a 3-optional-param tool. Pagination semantics (how start_page interacts with the tree) are the only notable gap.

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 baseline is 3, but the description adds genuine meaning the schema lacks: it defines 'category' as a parent id and specifies the special value 0 for top-level categories. max_items and start_page are left to the schema, which documents them adequately.

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 (retrieve sub-categories) and resource (Yahoo! Auctions Japan category tree), with the exact traversal rule (one level at a time). The 'Yahoo! Auctions Japan' qualifier cleanly distinguishes it from the many other *_categories siblings (olx, rakuten, ebay, trendyol, etc.).

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?

Gives clear operational context: pass a parent category id, use 0 for the top-level categories, and traverse one level at a time. It doesn't explicitly name an alternative tool or state when-not to use it, but the traversal guidance is strong enough that an agent knows how to start.

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