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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds real behavioral scoping beyond that: the result is a profile plus only the brand's top fragrances, not the complete catalogue. It stops short of noting rate limits, auth needs, or result ordering, so it is strong but not exhaustive.

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?

Front-loaded with the core action and returned payload, followed by one compact routing sentence. No filler, and every clause (slug format, alternative tools) 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 usefully enumerates the profile fields and notes that only top fragrances are returned, which is the key expectation to set. It omits any mention of the markdown/json response_format switch, a minor gap for an otherwise complete definition.

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 67% and the description only restates the slug guidance that the schema itself already provides ('Use the brand slug, e.g. maison-francis-kurkdjian'). It says nothing about the required context parameter or the response_format enum/default, so it adds little beyond structured data.

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?

Specific verb + resource ('Get a brand profile') with an explicit enumeration of returned fields (name, country, founded, description) and its scope ('its top fragrances'). It also contrasts itself with siblings by name, so an agent can distinguish brand_get from fragrance_search and perfumer_get without opening a 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 'See also' clause states the alternative tools and the exact condition selecting each: fragrance_search with the brand filter for the full paginated catalogue, perfumer_get when a house perfumer is known. This is explicit when-to-use routing rather than implied context.

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