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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds genuinely new behavioral context by disclosing what the call returns (slugs for downstream tools, page URLs for citation), which is valuable since no output schema exists. It stops short of describing pagination or limit behavior.

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?

Two tight sentences with zero filler; the purpose is front-loaded and the return-value note follows. Every clause 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?

With no output schema, the description carries the return-value burden and does so at a high level (slugs, page URLs). What is missing is guidance on result limits/truncation and how to narrow results when the query is broad, which an agent would benefit from.

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 67%: query and type are documented in-schema, while limit has no description anywhere. The description's "by name or topic" only loosely reinforces the query parameter and adds no format or syntax detail beyond the schema examples. Baseline 3 is appropriate.

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 (Find) and enumerates the resources it covers (rankings, products, books, categories, articles), plus the discovery role it plays by returning slugs for other tools. It does not explicitly distinguish itself from the search-adjacent siblings like list_rankings, so it stops short of a 5.

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?

"Returns slugs to pass to the other tools" implies this is the entry point before get_product/get_ranking/compare_products, which is useful implicit routing. However, there is no explicit when-to-use vs list_rankings or find_alternatives, and no stated exclusions.

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