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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds genuinely new context — the catalog is searchable in Ukrainian as well as English — but says nothing about result format, ranking, or result limits.

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 covering both the resource and both parameters, with no padding. The only blemish is the erroneous 'amazon' entry, which is a correctness issue rather than a length issue.

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 search tool with no output schema, the description omits what the results look like (tool names? schemas? operation IDs?) and any result-count behavior, which an agent needs to chain into describe_tool. The parameter list and the catalog scope are otherwise adequately covered.

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 coverage is 0%, so the description must carry the parameter burden. It does explain that query takes words (and adds the Ukrainian/English detail absent from the schema), but its platform list is a near-duplicate of the enum and wrongly includes 'amazon', which the schema does not allow — introducing ambiguity rather than resolving it.

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 (catalog tools and operations), so an agent knows it queries the tool catalog. It does not explicitly differentiate itself from sibling catalog tools like describe_tool or get_tool_schema, which is the only thing keeping it from a 5.

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 and no mention of alternatives, despite siblings describe_tool and get_tool_schema occupying the same discovery space. The agent must infer that this is the discovery entry point rather than being told.

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