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

No annotations are provided, so the description carries the full behavioral burden, yet it discloses nothing: not the formula (Fisher vs simple nominal-minus-inflation), not rounding or units, not the response shape, not whether inputs are percentages or decimals. The description is a pure tautology with zero behavioral content.

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?

Extremely short, but this is under-specification rather than conciseness — the single phrase repeats the name and earns no informational value. There is nothing to be front-loaded because nothing is said.

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 zero-annotation, zero-output-schema computation tool with two parameters, the description supplies none of the missing context (formula, unit convention, return value). The name alone conveys a rough idea, which keeps this above the floor, but it is far short of 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% for both parameters, so the schema already documents nominal and inflation; the baseline of 3 applies. The description adds no meaning — the schema's "Nominal to process"/"Inflation to process" wording is generic too, but the rubric gives the schema credit.

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?

"Real Rate: Real Rate" only restates the tool name; the title is null and there is no verb or resource beyond the noun phrase. An agent can guess this computes an inflation-adjusted (real) rate, but no formula, direction, or output is stated, and nothing distinguishes it from siblings such as x402-inflation-adjust or x402-purchasing-power.

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?

There is no when-to-use guidance, no mention of alternatives, and no statement of prerequisites. The sibling namespace contains several plausible inflation-related substitutes, and the description gives the agent nothing to choose between them.

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