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 adds useful behavioral context by disclosing that the response aggregates every color/size and every variant with per-variant pricing and stock — non-obvious scope that goes beyond the annotations, though rate limits and pagination are unmentioned.

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: the first front-loads what the tool returns, the second explains the parameter's meaning and provenance. No filler, and the most important scoping detail leads the description.

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?

For a single-parameter read tool with an output schema that already documents the response shape, the description supplies everything else the agent needs: what the resource is, what breadth of product data comes back, and where the handle comes from. Nothing material is missing.

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 0% for the single handle parameter, so the description must carry the load — and it does, defining handle as the product's URL path on quince.com and specifying its exact origin (quince_search's products[].handle field). This is precisely the info an agent needs to construct a valid call.

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 resource (Quince product detail) and enumerates exactly what it returns: title, description, review summary, selectable options with hex swatches, and every variant with price, original price, stock, and SKU. It is clearly distinguishable from siblings like quince_search (listing) and quince_product_reviews / quince_product_faq (sub-resources).

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 description explains the workflow prerequisite by stating the handle is 'returned by quince_search's own products[].handle field,' which tells the agent to run search first. However, it never explicitly contrasts itself with quince_product_reviews or quince_product_faq, so the agent must infer when to prefer this tool over those siblings.

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