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

No annotations are present, so the description carries the full behavioral burden. It does disclose the main output behavior: non-overlapping levers, booking dates, holidays used, factor, a markdown table, and a page URL. It does not cover failure modes, data source behavior, or rate limits, but for a read-only informational tool the disclosed output shape is reasonably substantive.

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 dense, front-loaded sentences with no filler. The ratio examples clarify the otherwise jargon-y term 'levers,' and the output details earn their place. Nothing is wasted.

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 read-only tool returning a fixed six-item list, the description covers the result categories, included fields, markdown table, and page URL. Input parameters are fully documented in the schema, so the absence of an output schema is adequately compensated by the concrete output description.

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%, so the baseline is 3. The description adds useful context around what 'levers' and 'factor' mean, but it does not add parameter-specific guidance beyond what the schema already provides for year, locale, and region.

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 exactly what the tool computes: the six best non-overlapping vacation levers for a year and region, with concrete examples of the lever types. This is specific enough to distinguish it from sibling tools like public_and_school_holidays and plan_vacation, even though those siblings are not named.

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 scope 'of a year for a region' and the focus on optimized bridge days/clusters implies the use case, so an agent can infer when to use it. However, there is no explicit guidance about when to prefer it over plan_vacation or public_and_school_holidays, and no when-not-to-use conditions.

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