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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so the safety and idempotency profile is covered. The description adds meaningful behavioral context beyond that: the scoring is explicitly deterministic and grounded in 'Pour Picks structured tasting data', telling the agent results are reproducible and data-derived rather than generative.

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 tight sentences with the core purpose and ranking method front-loaded; there is no filler or redundancy.

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 does convey the nature of the results (bottles ranked by similarity criteria), and both parameters are fully documented in the schema. It could say slightly more about ordering ties or return fields, but it is adequate for a two-parameter read 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 100%, and the schema documents both limit (max 10, default 5) and bottle_id (UUID or name). The description adds no parameter-level detail beyond the schema, so the baseline of 3 is appropriate.

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?

The description names a specific verb+resource (find bottles similar to a given bottle) and specifies the ranking criteria (shared flavor notes, body/sweetness/char proximity). This clearly distinguishes it from siblings like compare_bottles and find_cheaper_alternative.

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?

Usage is implied by the purpose, but there is no explicit guidance on when to choose this over compare_bottles, get_recommendations, or find_cheaper_alternative, and no stated exclusions or prerequisites. The agent must infer routing from the description alone.

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