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

Annotations already cover read-only, idempotent, non-destructive, and closed-world. The description adds real value beyond that by stating 'It never opens the link' — a key behavioral fact that explains why the URL must be a recognizable supplier page — and by describing the return content (matching product plus any selected colour). It does not say what happens when a link is unrecognized, which keeps it from 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?

Three sentences, front-loaded with the when-to-use clause, then the return value, then the follow-on tool. Nothing is repeated from the schema or annotations.

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 an output schema present, the description correctly does not re-document return structure, yet still calls out the salient result (matching product + colour). The only gap is failure behavior for unsupported or unrecognized links, which an agent would likely need to set expectations.

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 100% and there is only one parameter, so the baseline is already high. The description still adds meaning the schema's prose ('such as a Printify or Printful product link') does not: the full list of accepted suppliers, which is the actual semantic constraint on the url argument.

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+resource: resolve a supplier product link into a POD Benchmark product, with the supported supplier platforms enumerated. This clearly separates it from search_products or get_product, which take identifiers rather than pasted links.

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?

Explicit trigger condition ('when a seller pastes a supplier product link') plus the exact follow-on action ('ready for compare_product with yourSupplier set to that supplier'). The agent knows both when to call it and what to do with the result.

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