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

The annotations already declare readOnlyHint=true, openWorldHint=false, and idempotentHint=true, so the safety profile is covered. The description adds useful context by listing which fee components are included and showing a sample total, but it does not explain output granularity, assumptions, or whether rates are configurable.

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 compact, with one dense sentence plus a URL, and no obvious filler. It is slightly less front-loaded than ideal because it opens with a sample scenario rather than a direct statement of purpose.

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 six-parameter calculator with no output schema, the description provides a useful example but does not explain the return value or breakdown. The schema and annotations cover parameters and safety, but the description could do more to describe calculation output and scope.

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 schema already documents all six parameters, including enums and defaults. The description does not add parameter-level meaning beyond echoing cash purchase, AED 2M price, and 2% agent commission from the example.

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 makes clear that this is a Dubai property-purchase fee calculator by giving a concrete AED 2M example and naming the fee components: DLD transfer fee, trustee office, title deed, and agent commission plus VAT. It is clear but does not explicitly distinguish itself from nearby siblings such as dubai_mortgage_calculator or land_transfer_tax_calculator.

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?

It gives no explicit when-to-use guidance, no exclusions, and no alternatives. The example implies it is for cash Dubai home purchases, but an agent must infer the trigger conditions rather than being told them.

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