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

No annotations are provided, so the description bears the full responsibility. It discloses the premium nature, micropayment requirement, and data source. However, it does not clarify whether the operation is read-only or has side effects (e.g., persisting weights), nor does it describe the output format. These are meaningful gaps for a compute tool with no annotation safety hints.

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 concise sentences, front-loaded with the main action. The first sentence states the core purpose, the second clarifies the use case, and the third adds prerequisites and data source. No filler or redundant content.

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 8 required parameters, no annotations, and no output schema, the description is only partially complete. It explains the action and mandatory payment, but omits return value details (e.g., what does the 'full ranking table' contain? Are weights required to sum to 100?) and does not mention whether results are calculated on demand or cached. This leaves gaps for an agent to invoke and use the tool correctly.

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 89% (8 of 9 params have descriptions with defaults), so the schema already documents parameter meaning. The description adds only the phrase "custom metric weights," which does not go beyond the schema. Baseline 3 applies because the description adds insufficient value.

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 action: "Recalculates the full ranking table using custom metric weights," which combines a specific verb with a resource. It also differentiates itself from sibling tools like get_top_ranked by emphasizing custom weights and how priorities change rankings.

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 usage context: use when you want to explore how different priorities change rankings. However, it does not explicitly mention when NOT to use it or point to alternatives like get_top_ranked for default rankings. The prerequisite "Requires micropayment via MPP" is a constraint, not usage guidance.

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