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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so safety is fully covered structurally. The description adds essentially no behavioral context beyond that: no mention of result ordering, that pageSize is capped at 50, or how paging behaves across a large catalog. For an open-world search returning paginated results, that is a meaningful gap.

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?

A single front-loaded sentence with no filler, and the searchable axes are enumerated efficiently. It is perhaps too terse for a six-parameter open-world search, but nothing is wasted.

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, return values are exempt, and annotations carry the safety profile. However, for a zero-required-parameter, six-parameter search tool the description leaves unanswered how filters combine, how many results come back per page, and how it relates to get_product_detail.

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 67%, and the description names four of the six parameters (keyword, productCode, category, gameHubUrlName), roughly mirroring the schema rather than adding semantics. It says nothing about the two pagination parameters or about whether the filters are OR'd or AND'd, so the marginal value is modest.

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 ("Search") and resource ("ManaBuy products/games") plus the axes it can search on, so an agent immediately knows this is a discovery/lookup tool. It does not, however, distinguish itself from sibling get_product_detail, which is the obvious alternative once a product is identified.

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 only implied: the presence of "product code ... if known" and "hub URL name if known" hints that this is the entry point when identifiers are unknown, but the description never says when to prefer it over get_product_detail or whether filters can be combined.

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