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

Annotations already declare readOnlyHint and openWorldHint, so safety is covered; the description adds genuinely useful behavior beyond that — that FAQ content is not guaranteed and that a missing product returns a well-formed empty result rather than erroring. Knowing absence is normal, not a failure, is valuable for an agent.

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?

Three tight sentences: what it returns, where the handle comes from, and the empty-result caveat. Front-loaded with the resource definition and no filler, though the sibling reference in sentence one could be trimmed.

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 an output schema present, return formatting is handled elsewhere, and annotations cover the safety profile. The description covers the two things structured fields cannot: when content is absent and how the handle is sourced, making it complete for a simple single-param 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 coverage is 100% and the single handle parameter is already documented as coming from a search result's products[].handle. The description reinforces that the handle is the same value quince_product accepts, which adds a little cross-tool consistency context but no new syntax or format detail. Baseline 3.

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 resource (a Quince product's question/answer content) and even scopes what it contains (sizing, care, fit), so an agent knows exactly what comes back. It anchors itself against siblings by naming quince_product and quince_product_reviews, though it does not sharply contrast why you would pick this over quince_product itself.

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 tells the agent how to obtain the handle ('the same value quince_product accepts') which implies the calling context, but it never states when to use this tool versus quince_product_reviews or quince_product. Usage is implied rather than stated, and no exclusions are given.

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