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

Annotations already cover safety and idempotency. The description adds useful behavioral detail beyond them: it specifies the price basis (listed US total), the matching criteria (product, print method, blank), and hints at category records and largest gaps.

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?

It is concise, but the single sentence is dense and the ending 'with the record by category and the largest gaps' is grammatically unclear. The comparison question is front-loaded, but the result description is not well structured.

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?

There is no output schema, so the description should clarify return values. It vaguely mentions records by category and largest gaps, but does not fully explain the result shape, error cases, or what happens when suppliers have no overlapping products.

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%, and both parameters are already documented with examples in the input schema. The description adds no additional parameter syntax or constraints, so it meets the baseline for high schema coverage.

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 states a specific comparison: two suppliers by lower listed US total across overlapping products, matched on product, print method and blank. It is clearly distinct from product lookup or cost-listing siblings, though it does not explicitly name those alternatives.

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?

It describes what the comparison does but gives no explicit when-to-use guidance, prerequisites, or routing against sibling tools like find_products or get_product_costs. Usage is only inferable from the tool name and the comparison scenario.

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