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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the agent knows this is a safe external read. The description's one addition is what the call yields (PDF link plus cover page), which is genuinely useful since there is no output schema, but it omits access, availability, or failure behavior for older/future months.

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?

Two short sentences with no filler, front-loading the resource and then the return value. Nothing needs to be trimmed.

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, no-output-schema tool, the description covers what it returns and that it is monthly, which is most of what is needed. It still leaves the key semantic link between the fecha argument and month selection unexplained, so an agent could call it with an arbitrary date without knowing whether that is valid.

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 description coverage is 100% and there is only one parameter, so the ISO date format is already documented in the schema. The description adds nothing about how fecha maps to a monthly bulletin (e.g. whether a mid-month date selects that month's edition), which is the one ambiguity an agent could get wrong.

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 resource and action: a monthly judicial bulletin of the Poder Judicial, returning the PDF link and cover page. It is clear on its own, but it does not distinguish itself from the many buscar_*/leer_* siblings, so an agent cannot tell from the text alone why it would pick this over, say, obtener_texto_completo.

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 explicit when-to-use guidance and no mention of alternatives, despite 17 sibling tools. The monthly cadence is the only implicit usage signal, and nothing says whether to call this instead of the search tools or in combination with them.

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