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

No annotations are provided, so the description carries full burden. It mentions cost/payment info ([x402: 0.03 USDC on Base, pay-per-use]) which is unusual and useful, but it doesn't disclose what happens to the input (e.g., is it processed locally, uploaded?), error behavior, or output structure. It doesn't contradict annotations (none exist), but it's minimally transparent beyond the cost disclosure.

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 short (two sentences) and the core value proposition is front-loaded. The cost disclosure is extra but relevant. It could be more structured but is concise and not bloated.

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 tool with no annotations, no output schema, and only one vague parameter, the description is incomplete. An agent needs to know what input format to provide (file path? URL? base64?), what the output looks like (e.g., JSON structure), and how to handle errors. The cost info is a plus but doesn't cover these gaps.

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 coverage is 100% (only 'input' with description 'service input'), but that description is unhelpful. The tool description says 'input=archivo', which clarifies the parameter should be a file, adding some value. However, it doesn't explain accepted formats, size limits, or how the file should be encoded (base64? path?). Given high schema coverage, baseline 3 is fair, but the description only marginally compensates for schema's vagueness.

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 verb ('Sube un archivo') and resource (OCR + resumen + traducción in one call), which is clear. However, it does not distinguish itself from many sibling OCR tools like 'ocr', 'ocr-multi-language', 'resumir-documento', 'traducir-doc', etc. The phrase 'en una sola llamada' hints at a combined offering but doesn't name alternatives.

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 the OCR-only or summary-only sibling tools. The description implies a combined use case but doesn't state exclusions or alternative conditions. An agent cannot decide between this and 'ocr' or 'resumir-documento'.

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