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

No annotations are provided, so the description carries the full burden. It helpfully discloses that the tool itself costs nothing and that it only explains rather than executes a purchase. However, it does not mention other behavioral aspects such as required permissions, output format, or failure behaviors.

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 concise sentence that front-loads the main purpose and adds one valuable behavioral note about cost. Every clause earns its place with no redundant wording.

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 simple one-parameter informational tool with no output schema, the description covers what the tool does, what input is expected, and an important financial nuance. It is missing only explicit sibling differentiation to be fully complete.

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%, with the sole parameter 'host' described as 'Operator hostname.' The description adds merely the context that this host corresponds to 'a given operator,' which is marginal beyond what the schema already provides.

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 a specific verb and resource: it explains the evidence behind a verdict for a given operator and how to buy the report over x402. It is not a tautology and gives a concrete sense of the tool's function, though it does not explicitly distinguish itself from mizan_check or mizan_coverage.

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 this tool is for understanding report contents and purchase instructions, but it offers no explicit guidance about when to choose this tool over mizan_check or mizan_coverage. It also does not state any exclusions or alternative conditions.

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