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

Since no annotations are provided, the description carries the full burden. It usefully discloses that the output is a simplified explanation and that usage costs 0.002 USDC on Base, which is helpful operational context. It does not mention output format or language, but the tool is simple and has no destructive side effects.

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 compact and front-loaded: purpose first, then parameter mapping, then pricing. Every part earns its place with no filler.

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, low-complexity tool, the description is sufficiently complete: it states the action, the input, the output style, and the cost. There is no output schema, but 'Explica ... en lenguaje simple' effectively conveys the expected return. It could add output language, but that is a minor gap.

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?

The schema only describes the parameter as 'service input', which is generic. The description adds real meaning with 'input=texto/concepto a explicar', clarifying exactly what should be passed to the tool.

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 verb 'Explica' plus the object 'un concepto o texto en lenguaje simple' clearly identifies the operation and output style. It does not explicitly distinguish itself from siblings like 'explain' or 'interpretar', so it loses a point.

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?

No guidance is given on when to choose this tool over siblings such as 'explain', 'code-explain', or 'interpretar'. There are no exclusions, alternatives, or prerequisites; the only usage hint is the 'input=' line, which mainly describes the parameter rather than a decision rule.

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