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

With no annotations, the description carries the full disclosure burden. It does helpfully enumerate the return shape (title, price, store domain, store rating, product link), which is the most valuable trait here since no output schema exists. However, it says nothing about auth requirements, rate limits, pagination beyond the limit param, or behavior when no matches are found.

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 first states the action and scope, the second enumerates the return fields. Nothing is padded and the most decision-relevant information (what it searches) is front-loaded.

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 simple two-parameter read-only search with no annotations and no output schema, the description covers purpose and return fields, which is most of what an agent needs. The remaining gap is the absence of any statement about result ordering, pagination limits, or empty-result behavior.

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%, so both query and limit (1-20, default 8) are already documented in the schema. The description's 'by keyword' phrasing loosely maps to query but adds no syntax, matching behavior, or format detail beyond what the schema provides, so the 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?

The description gives a specific verb+resource ('Search creator-recommended products by keyword') and additionally names the returned fields, so an agent knows exactly what the tool produces. It does not explicitly contrast itself with the siblings compare_alternatives or get_price_history, but the 'creator-recommended products' scope is distinct enough that confusion is unlikely.

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?

There is no when-to-use guidance, no prerequisites, and no mention of the sibling tools (compare_alternatives, get_price_history) or when to prefer them. The schema's query description ('What the shopper is looking for') implies a search context, but routing guidance is absent.

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