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

No annotations are provided, so the description has the full responsibility to disclose behavior; it only mentions a payment requirement ('pago x402 $0.5 USDC'). It does not state side effects, permissions, return behavior, or what generation implies, leaving the agent with a very thin behavioral picture.

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 phrase, which is concise, but the traded-off under-expansion is the real problem: the payment note consumes half the text while the most critical input/output details are absent. It is less 'concise' and more 'under-specified.'

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 single-parameter tool with no output schema and no annotations, the description still does not form a usable contract: it neither defines the input content nor the expected result (e.g., image, URL, chart data). The agent would need to guess or experiment to call it correctly.

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 sole parameter 'input' is a required string with no schema description, and the tool description does not explain what the input should contain. With 0% schema description coverage and no compensation in the description, the agent has no way to correctly satisfy the parameter.

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 specific action ('Generar') and resource ('grafico/visualizacion'), so the core purpose is identified. However, it barely differentiates the tool from siblings like 'analisis_datos' or 'reporte' and comes close to restating the tool name without explaining scope or output format.

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 on when to use this tool versus siblings. The description does not mention preconditions, when NOT to use it, or which alternative fits better, so the agent is left to infer routing from sibling names alone.

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