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

Beyond the readOnly/openWorld annotations, the description discloses real operational behavior: page size is fixed at 48 and cannot be changed, page 1 is fully validated while later pages are 'best-effort' and provisional, and non-default sorts are reliable only from a clean egress address. These are non-obvious deployment caveats an agent would otherwise hit blindly.

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?

Single paragraph that front-loads the purpose and return shape before caveats about pagination and sorting. Dense but no filler; a marginal amount of the page/sort detail duplicates the schema, slightly bloating it.

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 an output schema present and annotations covering the safety profile, the description needs only to add operational and usage context, which it does well (pagination limits, sort reliability, category source). The only gap is the lack of sibling routing, which leaves alternative selection to inference.

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 the schema already documents page, sort, locale and category semantics; the description largely restates the same page/sort details. It adds little beyond the schema except tying category to hermes_categories, so the baseline 3 applies.

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 ('Browse one Hermès category') and enumerates what a page contains (SKU, title, price, currency, colour, size, stock, images, personalization flag) plus facets and category metadata. It is clear about scope but does not name or differentiate from siblings like hermes_products or hermes_search, so an agent must infer the distinction.

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 useful operative context: category takes a code 'from hermes_categories', sort accepts relevance/priceasc/pricedsc, and page advances results. It never states explicitly when to choose this tool over hermes_products or hermes_search, nor any exclusions, so usage is implied rather than prescribed.

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