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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description goes beyond them by disclosing that the total count is the index's own live count and that a genuinely empty result yields a well-formed empty products list rather than an error — a real edge-case behavior an agent would otherwise have to guess.

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 dense sentences, front-loaded with the action and scope, then the return shape and edge case. The field enumeration is long but informative; little waste overall, though the parenthetical list could be tightened.

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?

An output schema exists, so explaining return values is optional, yet the description covers the empty-result case well. The remaining gap is the undocumented pagination parameters (page/size/limit), which no other structured field covers for a 4-parameter search tool.

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 0%, so the description must carry the weight. It only implies the keyword maps to the required 'q'; page, size, and limit are never explained, and the unusual string-typed 'size' is left ambiguous. The mention of a 'live total result count' hints at pagination but gives no guidance on the pagination parameters themselves.

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 (search) and scope (Gucci's product catalog by keyword), and enumerates the fields of the returned product summaries (name, price, colors, materials, sizes, gender, stock). An agent can distinguish this from gucci_product (single item lookup), gucci_categories, and gucci_suggest (typeahead) without opening any 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?

The keyword-search framing implies when to use it, but the description names no conditions, prerequisites, or alternatives despite sibling tools like gucci_suggest and gucci_product covering adjacent needs. Usage is inferred rather than stated.

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