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

No annotations are provided, so the description carries the full disclosure burden, and it adds no behavioral context. It does not say how input should be formatted, how the resulting ratio is represented, or how edge cases are handled.

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 one short, front-loaded sentence with no wasted wording. It is appropriately concise for a simple converter, though its brevity contributes to the missing format details.

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 one-parameter converter this is minimally adequate: the operation is clear. However, without an output schema and without description of input/output format, an agent must guess how to pass the percent and what a ratio result will look like.

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% for the single parameter, and the schema labels it as a string. The description adds no format details such as whether the input should be '50' or '50%', so this sits at the baseline for high schema coverage.

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 names a specific conversion operation and direction: percent to ratio. It is clear enough to distinguish from the reverse sibling x402-ratio-to-percent by direction, though it does not name alternatives explicitly.

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 offers no when-to-use guidance, prerequisites, or comparison to related tools such as x402-ratio-to-percent or x402-percent-of. The implied use is self-evident from the tool name, but no explicit routing is provided.

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