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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description goes beyond that by disclosing the shape of the response in behavioral terms: swatches carry hex codes, variants each carry their own price, original price, stock status and SKU. It does not mention pagination or rate limits, but for a read-only detail fetch this is useful additional context.

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 sentences, front-loaded with the scope statement before the field enumeration, and the parameter origin is saved for last. The middle enumeration is dense but each listed field is informative rather than filler, so little is wasted.

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 return-value documentation is technically redundant, yet the description stays consistent with it and adds the aggregation semantics (all colors and sizes in one call). Combined with annotations that cover the read-only profile, an agent has what it needs to invoke this correctly; only the sibling-boundary question is left open.

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 single parameter is fully documented in the schema as the product URL handle from a search result's products[].handle. The description largely repeats that and adds only that it is the product's URL path on quince.com, a marginal semantic addition. Baseline 3 is appropriate when the schema carries the parameter documentation.

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 opening clause names a specific resource and scope: product detail that consolidates every color and size, with an explicit enumeration of what the payload contains (title, description, reviews summary, options, variants). It does not explicitly name the sibling detail tools (quince_product_reviews, quince_product_faq) it overlaps with, so an agent must infer the boundary, but quince_search is named as the upstream source, which anchors it well.

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 states the prerequisite for use: handle is the product's URL path, sourced from quince_search's products[].handle field, which gives a clear call sequence. There is no explicit when-not guidance or mention of the sibling detail endpoints, so an agent knows how to call it but not precisely when to prefer it over quince_product_reviews or quince_product_faq.

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