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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds real value beyond that: the exact verdict vocabulary returned, the components of the response (grade, fair price band, tag checks, cost per wear, better-value makers) and a data-freshness caveat ('checked September 2026').

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?

Purpose and triggers are front-loaded, and the sentences are dense with useful detail. The parenthetical list of resale sites (Nordstrom Rack, outlet, eBay, Grailed) partially duplicates the 'where' enum values, which is minor redundancy but not bloat.

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 carries the return-value burden and does it well, enumerating the verdict outcomes and the accompanying grade, price band, tag checklist and cost-per-wear figures. It also flags the vintage of the underlying grading data, which an agent needs to caveat its answer.

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%, so the baseline is 3. The description goes slightly beyond by clarifying which details come from the listing text (fiber, build, compare-at price, where it is sold) and that they are supplied 'if known', signaling they are optional rather than required.

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 states a specific verb (judge/evaluate) and resource (one piece/secondhand or retail listing) with clear scope: a single-item worth-it verdict before purchase. It is easily distinguished from siblings like quartermaster_get_maker and quartermaster_plan_outfit, which do not evaluate price value.

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?

It gives explicit trigger conditions and even quotes the user phrasings ('is this worth it?', 'is this a good deal?', 'should I buy this?') plus the paste-a-listing case. There is no explicit when-not-to-use or routing to a sibling, so it falls just 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.