get_public_holidays_range

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

Annotations already declare readOnlyHint and idempotentHint, indicating safety. The description adds value by detailing the output structure (e.g., holidays array with date/name) and listing supported countries, going beyond the annotations.

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 two sentences: the first defines purpose and output, the second gives use cases. It is front-loaded, concise, and every sentence is informative with no redundancy.

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 tool's simplicity (3 parameters, output schema available, clear annotations), the description covers purpose, usage, and supported countries. It lacks details on error handling for unsupported countries or invalid dates, but overall is sufficient for an agent to invoke correctly.

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?

All three parameters are fully described in the input schema (100% coverage). The description adds extra context about supported country codes but does not significantly enhance parameter understanding beyond the schema.

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 that the tool returns public holidays for a specified European country within a date range, with a list of supported countries. It differentiates from country-specific holiday tools (e.g., get_france_holidays) by being a range-based query, but does not explicitly contrast with sibling tools like calculate_working_days_eu.

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 advises using when calculating SLA periods, project timelines, or delivery windows that skip non-working days, providing clear context. However, it does not explicitly state when not to use this tool versus alternatives like calculate_working_days_eu.

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