run_ebay_category

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

No annotations exist, so the description carries the full behavioral burden. It usefully discloses cost ('Flat 5 points per successful run') and 'Get' implies a read-only operation, but it says nothing about response size, caching, or tree depth, and there are no annotations to cover that gap.

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?

Two tight sentences with zero filler: the purpose is front-loaded and the cost note follows immediately. Every sentence earns its place.

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 is the only source of return-value information, and it only says the tree spans departments, categories, and subcategories without describing fields (IDs, names, hierarchy depth). Adequate for a zero-parameter tool but leaves the agent guessing about the payload.

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?

The tool takes zero parameters, which is the baseline-4 case per the rubric. The description correctly implies no inputs are needed and adds nothing misleading about parameters.

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 and resource: 'Get the full eBay browse category tree,' and enumerates its scope ('every department, category, and subcategory'). It is clearly distinguishable from the other eBay siblings (run_ebay_item, run_ebay_item_search, run_ebay_product), though it does not explicitly name any of them.

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 explicit when-to-use or when-not-to-use statement, and no alternatives are named. However, the single-purpose, zero-parameter nature of a full category tree makes the intended usage strongly implied rather than ambiguous.

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