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

No annotations are provided, so the description must carry the burden of disclosing behavioral traits. It mentions the output (markdown table, page URL) but does not state whether the tool is read-only, requires authentication, or has any side effects. This is a moderate gap given that the tool likely performs a read-only query.

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 a single sentence that efficiently conveys the core function and output, with examples embedded. It is slightly dense but remains focused and front-loaded with the main action ('six best non-overlapping vacation levers'), earning a high score for conciseness.

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?

Given the detailed schema and simple input requirements, the description provides sufficient context for an agent to understand the tool's purpose and output. It does not mention edge cases or preconditions, but the schema plus description cover what is needed for typical use.

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 schema descriptions cover all three parameters (year, locale, region) with clear explanations (e.g., region format examples). The tool description itself adds no further meaning beyond the schema, so the baseline of 3 is appropriate.

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's function: it provides the six best non-overlapping vacation levers for a region and year, specifying the types (classic bridge days, holiday clusters) and output details (booking dates, holidays used, factor, markdown table, page URL). This leaves no ambiguity about what the tool does.

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 does not explicitly differentiate this tool from its siblings (list_regions, plan_vacation, public_and_school_holidays). While the purpose implies when it might be used (e.g., for vacation planning), it lacks an explicit statement about when to prefer this tool over alternatives or when it is not appropriate.

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