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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, so the safety profile is covered. The description adds genuinely new behavioral context: every response carries a 'url' and an 'atribucion', and the CC BY 4.0 licence obliges the caller to cite and link the source; it also disclaims that the match test is not a voting recommendation.

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 main purpose is front-loaded, but the entry is a dense, comma-chained block that mixes content inventory, the match test, attribution rules and licensing into one breath. The licence/attribution sentence earns its place, but several clauses (the test description, program status) could be tightened.

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?

With one optional parameter, no output schema and full annotation coverage, the description is largely self-sufficient: it explains the returned fields ('url', 'atribucion') and the conditional provincial payload. Only the absence of routing guidance against siblings keeps it from a 5.

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% for the single 'provincia' parameter, so the baseline is 3. The description goes beyond the schema by explaining what changes when a province is supplied (deputy/senator counts and BOE-published candidacies), adding real semantic value.

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 resource (the 29N general elections) and enumerates concrete payloads: the official calendar with per-deadline status, provincial seat allocation, candidacies, program status, and the vote-match test. It is clear what the tool returns. However, it never distinguishes itself from overlapping siblings such as ver_programas_29n (program status) or ver_provincia (provincial data), so it falls 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?

Usage is only implied through the content listing and the conditional clause 'si se indica una provincia'. There is no explicit statement of when to call this tool versus ver_programas_29n or ver_provincia, and no when-not guidance, leaving the agent to infer routing from the data it returns.

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