is_uae_holiday

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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false, and destructiveHint=false, so the safety and idempotency profile is fully covered. The description adds only the qualifier 'Gregorian', which usefully signals that Hijri dates must be converted first (cf. hijri_to_gregorian), but says nothing about behavior such as weekend/holiday-boundary handling or whether results reflect observed vs. announced dates.

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?

One short sentence with the key constraint (specific Gregorian date) front-loaded and no filler. Every word earns its place.

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?

An output schema exists, so return values need no explanation, and the single-parameter input is fully documented in the schema. The only missing piece is routing relative to the uae_holidays and uae_next_holiday siblings, which is a minor gap for such a simple tool.

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% – the single date_str parameter is fully documented as ISO YYYY-MM-DD in the schema. The description's 'Gregorian' qualifier adds a small disambiguation (not a Hijri date) but no format or range detail beyond the schema, so the baseline 3 applies.

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?

States a specific verb (check) and resource (whether a Gregorian date is a UAE public holiday), so the agent knows exactly what it returns. It does not explicitly differentiate itself from close siblings uae_holidays (list) and uae_next_holiday (next upcoming), which keeps it out of 5 territory.

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 when-to-use guidance, no exclusions, and no mention of the sibling tools uae_holidays or uae_next_holiday. Usage is only inferable from the phrasing 'check whether a specific date', which is implied context rather than stated guidance.

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