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

Annotations already declare readOnly/idempotent/non-destructive, so the description only needs to add behavior beyond that. It does: results are limited to in-stock items, capped at 6, and include price, available sizes/options with variant_id, and links. It omits whether truncation is silent or signaled, but the core result shape is disclosed.

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 sentences with the scope declared first and the sibling redirect last, so nothing is buried. The phrase 'other than a racket fit' is slightly awkward and forces a re-read, which keeps it from a 5.

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 carries the return-shape burden and does so (cap of 6, fields returned, variant_id, links). Combined with annotations covering safety, the only meaningful omission is the pricing filter and truncation signaling, which are minor for a read-only search.

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 60%, and the description echoes the meaningful semantics: category coverage, query as brand/model name, and that size filters to in-stock items. It says nothing about max_price_usd, which is undocumented in both schema and description, and does not clarify gender beyond a passing mention of apparel. Adequate against a partly documented schema, but with an unaddressed gap.

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 (finds), resource (in-stock padel gear), vendor scope (Padel USA), and enumerates the covered categories. It also distinguishes itself from the sibling find_racket by naming it directly, so an agent can choose between the two without inspecting either schema.

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?

Explicitly routes racket-recommendation intent to find_racket and lists the categories this tool should be used for. The when-to-use and when-to-use-something-else conditions are both stated in the text.

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