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

No annotations are present, so the description is the only source of behavioral information. It does disclose an important behavior: this tool involves a payment of $0.3 USDC ('pago x402 $0.3 USDC'), which is critical for an agent to know before invoking. However, it does not clarify what side effects occur, whether the input is a prompt, or what the output format is. The payment note adds value but more behavioral context is needed.

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, short sentence that front-loads the purpose and appends the payment note. It is concise and free of fluff, though the cryptic 'x402' could be clearer. It earns its place by conveying the core action and a key cost in a compact form.

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?

With one parameter, no annotations, and no output schema, the description carries a heavy burden. It explains what the tool does and the cost, but it omits crucial context: what the 'input' should be, what the output looks like, and any constraints or limitations. An agent would struggle to invoke it correctly without further information.

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 has one required parameter 'input' with no description, and schema description coverage is 0%. The tool description does not mention the parameter at all, so it adds zero meaning about what 'input' should contain or how to structure it. The agent is left guessing what to provide.

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 states a clear verb and resource: 'Escribir un snippet o script pequeno' (write a small code snippet or script). This distinguishes it from sibling tools like 'resumen' or 'traduccion', which have different purposes. The payment note is extra and doesn't obscure the core function.

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 guidance about when to use this tool versus alternatives. No mention of prerequisites, suitability, or exclusions. The agent must infer from the name and description that it is for generating code snippets, but no explicit comparison with sibling tools is provided.

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