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

With no annotations, the description carries the full burden. It specifies the returned data fields (price, file format, etc.) and mentions support for the x402 micropayment protocol, which provides useful behavioral context beyond a simple fetch.

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 two concise sentences. The first states the core purpose, while the second adds valuable detail about the return data and protocol support. Every sentence 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?

For a single-parameter tool with no output schema, the description covers purpose, returned fields, and a special protocol. It is mostly complete, though it could mention potential error cases or authentication requirements.

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?

The single parameter is described in the schema as 'Product identifier slug'. The description reinforces this by stating 'by its slug identifier', adding clarity. With 100% schema coverage, the description provides marginal extra value.

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 clearly identifies the action ('Get full details'), the resource ('a specific Bazaar product'), and the identifier method ('by its slug identifier'). This distinguishes it from sibling tools like list_bazaar_product (listing) and search_products (searching).

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 implies usage for retrieving full details of a specific product, but does not explicitly state when to use this tool versus alternatives, nor does it provide exclusions or prerequisites. The context from sibling names helps, but direct guidance is missing.

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