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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered. The description adds a genuinely useful access constraint (Pro account required) but says nothing about pagination behavior despite cursor/limit parameters, so real behavioral context is only partial.

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?

One crisp sentence for purpose and one for prerequisites, followed by a compact 'See also' routing line. Nothing is padded, though the see-also block adds length without stating selection conditions.

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 six parameters, 17% schema coverage and no output schema, the description covers the domain and access requirement but leaves pagination, sort semantics and response format unexplained. Adequate minimum viability, not complete.

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 only 17% across six parameters, so the description must compensate and largely does not. The phrase 'own, have tried, or finished' loosely maps to the status enum (CURRENT/TRIED/FINISHED), but sort, limit, cursor and response_format get no explanation beyond the schema.

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 fragrance cabinet) and defines its scope precisely as 'fragrances you own, have tried, or finished'. The scope maps onto the sibling user_get_wishlist distinction, so an agent can tell them apart without opening the 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?

Gives a hard prerequisite ('Requires a Pro account') and explicitly routes to three siblings with their purposes (fragrance_get, fragrance_similar, user_get_wishlist). It lacks explicit 'when not to use' guidance relative to closer siblings like user_get_collections, so it falls short of a 5.

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