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

No annotations are provided, so the description must carry the behavioral burden. It reveals that results are 'highest-rated', 'verified', and 'currently featured', but does not disclose other behavioral traits such as authentication requirements, rate limits, or whether operation is read-only. Some insight is given, but not comprehensive.

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 a single sentence that is direct and to the point, containing no unnecessary words. It front-loads the key action and subject.

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 the tool has only two optional parameters, no output schema, and no nested objects, the description sufficiently explains what the tool returns (discounts) and the filtering criteria (highest-rated, verified, featured). It could be slightly more explicit about the return format, but overall it is adequate.

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 input schema already provides descriptions for both parameters (limit and category) with 100% coverage. The description does not add parameter-specific meaning beyond listing the resource attributes. The baseline of 3 is appropriate as the schema covers the semantics adequately.

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 states the verb 'List' and the resource 'highest-rated verified discounts currently featured on the site'. It distinguishes this from sibling tools such as getReferralCode and searchExchanges, making the tool's purpose unambiguous.

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 the tool is used for listing featured discounts but does not provide explicit guidance on when to use it over alternatives or when not to use it. No exclusion conditions or prerequisites are mentioned.

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