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

With no annotations, the description carries the full behavioral burden, and it does disclose the key trait: read-only, no cart or order side effects. It also enumerates the return payload. It omits auth requirements, pagination semantics beyond the limit param, and rate limits, which is why it isn't a 5.

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 sentences, front-loaded with the core action and capped by the read-only constraint. Every clause carries information; nothing is redundant with the title or repeated.

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 search with no output schema, the description covers purpose, return fields, and the critical read-only limitation, which is enough for correct invocation. Minor gaps remain around result ordering and how matching works, but nothing essential 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 description coverage is 100%: both 'query' and 'limit' are already documented in the schema with an example and a default/max. The description adds no syntax, formatting, or matching-behavior details beyond the schema, 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?

States a specific verb and resource ('Search the public Family Fishin product catalog') and scopes the domain to products, which separates it from search_articles/get_article. It does not explicitly name the sibling tools or contrast with get_product, so it falls just short of the top mark.

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 gives clear context (public catalog search) and an explicit exclusion: it cannot add items to a cart or place orders, which steers agents away from treating it as a transactional tool. It stops short of naming an alternative tool for single-product lookup or article search.

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