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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so safety is covered; the description adds genuine value by disclosing the response surface (variants carrying productUid and external ids, publishing state) in the absence of an output schema. It stops short of auth needs, rate limits, or 404/not-found behavior, but the added context is real rather than redundant.

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 compact sentences: the payload list comes first, then the REST route. Every clause is informative; the endpoint string is marginally redundant with the title but useful for mapping to the underlying API.

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 field enumeration is what makes this definition adequate for an agent that needs to know what comes back, and annotations plus a fully described two-parameter schema cover the rest. Only error/traversal behavior and explicit sibling routing are 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 description coverage is 100% and both parameters carry patterns, length bounds, and a cross-reference to gelato_list_store_products. The description adds no parameter-level meaning (productUid/external ids refer to the response, not the inputs), so the schema does the work and baseline 3 applies.

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 verb+resource (fetch one product of a connected store) and enumerates the returned surface (title, description, status, variants, options, preview, publishing state), which separates it from the sibling gelato_list_store_products and from the catalog-level gelato_get_product. It never names those siblings outright, so differentiation is implied by 'connected store' rather than stated.

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: retrieve a single store product given a store_id/product_id pair, which the schema pins to gelato_list_store_products. There is no explicit when-to-use versus gelato_get_product or when-not guidance, and no mention that both ids are mandatory prerequisites.

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