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

The description is minimal and adds no behavioral context beyond the readOnlyHint annotation. It does not contradict annotations, but fails to provide additional details like pagination or response format.

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?

Single short sentence that is front-loaded and contains no wasted words. Every word adds value.

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 parameterless read-only tool with annotations covering the safety profile, the description is complete. It tells the agent exactly what the tool returns.

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?

No parameters exist, so schema coverage is 100% vacuously. The description cannot add meaning beyond that. Baseline for 0 parameters is 4.

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 clearly states the tool lists upcoming closures (unavailable dates). The verb 'lista' and noun 'cierres' match the tool name. Among siblings, 'check_availability' likely checks available dates, so this distinguishes closures.

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 implies when to use (to see closure dates) but does not explicitly state when not to use or mention alternatives. However, the sibling context provides some guidance.

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