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

With no annotations supplied, the description carries the full behavioral burden. It usefully discloses that rankings are based on 30-day spend from real buyers and lists included fields like paid calls, median price per call, chains, and links. However, it does not cover pagination, result limits, authentication, or explicitly confirm the read-only nature of the operation.

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 definition is a single dense sentence with a clear colon-led list. It front-loads the ranking scope before enumerating included fields. There is little wasted wording, though it could be slightly clearer as a verb-led statement.

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 2-parameter tool with no annotations and no output schema, the description reasonably explains the ranking basis and lists key return fields. It does not mention result limits, sorting direction, or whether all matching sellers are returned, which are relevant for a ranking tool. The schema fully covers the input parameters, so the main gap is in return behavior.

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%, so both category and max_price are already documented in the input schema. The description adds no additional parameter meaning beyond the schema's own explanations. The baseline of 3 is appropriate because the schema does the heavy lifting.

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 specifies that the tool returns a ranking of sellers in one category, ordered by 30-day spend from real buyers. That is clear enough to distinguish the resource and ranking basis. However, it does not explicitly differentiate the tool from siblings like categories or seller.

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 explains what the tool returns but does not state when to use it versus alternatives such as categories or seller. It implies usage for category-specific seller rankings, but provides no explicit guidance or exclusions.

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