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

Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds that it is specifically for 'Deel EOR' (employer of record), which is useful context, but it does not disclose rate limits, external API dependencies, or whether the result is an estimate versus a binding quote. With annotations present, a 3 is appropriate.

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 concise sentences, front-loaded with the core action and followed by a clear usage example. Every sentence earns its place 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 rich annotations and full schema coverage, the description is largely complete for an agent to select and invoke the tool. It could be improved by explicitly contrasting with the take-home pay sibling, but the core information is sufficient.

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 all four parameters are fully documented in the input schema. The description adds no additional parameter-level details (e.g., format hints or defaults). When schema coverage is this high, the baseline score is 3.

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 uses a specific verb 'Calculate' and resource 'total cost of hiring someone in a specific country through Deel EOR', making the purpose clear. It does not explicitly differentiate from the sibling tool 'deel_calculate_take_home_pay', but the distinction between employer cost and take-home pay is reasonably inferable.

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 provides a clear usage trigger: 'Use when the user asks "how much would it cost to hire in [country]?" or about employment costs abroad.' This gives explicit context without exclusions. It does not mention alternative tools like deel_calculate_take_home_pay, which would be helpful for disambiguation.

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