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

No annotations are provided, and the description adds minimal behavioral information beyond the tool name. It does not disclose data source, return format, caching, rate limits, or whether the results are limited to a specific region or date range.

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 concise and front-loaded, using a short verb-resource phrase. The empty '[COST: ]' prefix is arguably noise, but the overall length is appropriately minimal.

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, the description provides the basic purpose, and an output schema exists to cover return details. However, 'upcoming public holidays' is vague about which holidays are covered, for what timeframe, and from what source, so more context would improve completeness.

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 tool has zero parameters and the schema has 100% coverage, so the description does not need to document parameter details. The no-parameter baseline of 4 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 states a clear verb and resource: 'Get upcoming public holidays', which is sufficient to identify the tool's core purpose. It is distinguishable from the many sibling get_* tools by its holiday-specific subject, though it doesn't specify a country or calendar scope.

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 guidance on when to use this tool instead of the many related get_* siblingscars, nor any indication of prerequisites or context. The description only names the action and leaves usage decisions entirely to the agent.

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