Generando URL del PDF

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

With no annotations, the description carries the full behavioral burden and does well: it discloses that access is public/unauthenticated via the PJ ServletDescarga, that the MCP server only returns the URL rather than fetching the PDF, and that a bad uuid yields a 500 from the site. This is meaningful error and side-effect context.

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 purpose is front-loaded and capitalized, and the Args/Devuelve structure is easy to scan. It is slightly longer than strictly necessary with the docstring-style headers, but no sentence is pure waste.

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 covers the essentials: what is produced (a URL), the return dict keys {ok, url, archivo}, auth expectations, and error behavior. Only the choice relative to sibling data tools is unaddressed.

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 0% (schema only declares a generic string), so the description must compensate. It does by specifying the uuid identifies a row/record and giving the concrete format (8-4-4-4-12 hexadecimal), which is genuinely useful validation guidance.

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 names a specific action (generate a public download URL) and resource (PDF of a resolution), which clearly separates it from data-fetching siblings like ficha_resolucion or buscar_resoluciones. It does not name an alternative sibling explicitly, so it stops short of a 5.

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?

It states the URL is public and needs no session/token, implying usage, and notes the MCP server does not download the file. However, it never says when to prefer this over ficha_resolucion or the buscar_* siblings, leaving the routing decision to inference.

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