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

Annotations already cover read-only, idempotent, non-destructive, and closed-world behavior. The description adds useful behavioral detail: results are sorted cheapest-first and pricing supports DE and AT. It does not disclose rate limits or default stock filtering, but those are either schema-covered or minor.

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 description is front-loaded and mostly efficient, with the alternative tool named at the end. The sentence listing returned fields is slightly redundant because an output schema exists, though the cheapest-first sorting detail still earns its place.

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?

Given annotations, full schema coverage, and an output schema, the description provides enough context to call the tool correctly: it covers purpose, result ordering, country support, and the key alternative sibling. Nothing essential is missing for an agent deciding whether to invoke it.

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 the schema already explains all seven parameters in detail. The description adds only modest meaning, mainly that the query may target a brand or model number and that pricing supports DE/AT; it does not add syntax or filtering semantics beyond the schema.

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?

It states a specific verb and resource: searching bicycle products by name, brand, or model number across clearly named categories. It also distinguishes itself from the closest pricing sibling by telling the agent to use get_best_price when an EAN is already known.

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 says when to use it (searching parts/components/accessories/clothing by name, brand, or model number) and names the explicit alternative when an EAN is already available. This is a clear routing rule, not just implied guidance.

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