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

No annotations, so the description carries the full burden; it does disclose the shape of the payload (variants, price range, public text), which is useful. It never states that the operation is a read-only lookup, how missing/unknown SKUs behave, or whether the 'store' scope changes results.

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?

The core English sentence is tight and front-loaded. The appended Dutch translation duplicates the same content verbatim, which is pure redundancy for an agent unless locale matching is intentional, so the definition is roughly twice as long as it needs to be.

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 zero annotation coverage, no output schema, and three undocumented parameters, the description should do more. It tells the agent what fields come back but leaves the identifier contract (which parameter keys the lookup) and failure behavior entirely unspecified.

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 0% for all three parameters (sku, store, agentId), and the description compensates for none of them — it never mentions SKU as the key, nor what 'store' or 'agentId' mean or whether they are required for resolution. The term 'feed' hints at catalog scoping but adds no parameter-level meaning.

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 and scope: a single product from the feed, with variants, price range and public text. That differentiates it clearly from a listing/search tool like gnv_catalog_search, though it never names the sibling explicitly.

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 phrase "One product" implies single-item lookup versus a search/browse flow, so usage is inferable. But there is no explicit when-to-use guidance, no mention of the alternative gnv_catalog_search, and no note on what to do when the SKU is unknown.

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