sii_cerrar_sesion

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

No annotations are provided, so the description carries the full burden. It adds useful behavioral context beyond mere action: it discloses the session limit, error code, and advises closing to avoid issues. However, it does not describe return values or error handling, which would make it more transparent.

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 two sentences long: one states the action, the other provides rationale. Every sentence adds value, with no redundant words or repetition of schema information.

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 simple zero-parameter logout tool with no output schema, the description is sufficiently complete: it states the action, gives a rationale (session limits, error code), and suggests when to use it. It could add details about the response format or behavior when no session is open, but these are not critical for understanding the tool's core function.

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 tool has zero parameters, and the schema coverage is 100% (empty schema). With no parameters, the baseline is 4, and the description correctly does not include parameter details since none exist.

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 uses the specific verb 'Cierra' (closes) with the resource 'la sesión abierta en el SII' (the open session in the SII), which clearly states the tool's function. It is easily distinguished from sibling tools that list or emit documents, as none handle session management.

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?

The description explains that SII limits simultaneous sessions and blocks when exceeded (error code), and recommends closing the session when finished ('conviene cerrarla al terminar'). This provides clear context on when to use the tool, though it does not explicitly mention alternatives or exclusions.

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