vat_filing_calendar

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

With no annotations provided, the description carries the full burden. It clearly discloses the tool's logic (thresholds, filing frequency, rate, and amendments). It does not mention non-destructive nature, but that is implied for a lookup tool.

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 paragraph, front-loaded with the purpose, and every sentence adds value. No filler or 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?

For a simple one-parameter tool with an output schema, the description covers all essential aspects: registration thresholds, filing frequency rules, rate, and recent legal amendments. It gives the agent enough context to invoke the tool 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?

The input schema has 0% description coverage, but the single parameter 'annual_revenue_aed' is self-explanatory. The description adds significant context by specifying the exact thresholds (AED 375,000, AED 187,500, AED 150 million) and how revenue determines filing frequency.

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 purpose: 'Determine the UAE VAT registration requirement and filing frequency.' It provides specific revenue thresholds and distinguishes itself from sibling tools like corporate_tax_estimate by focusing narrowly on VAT.

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 explains when to use the tool (for UAE VAT registration and filing frequency) but does not explicitly state when not to use it or mention alternatives. This is adequate but could be improved with exclusionary guidance.

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