calculate_uk_student_loan

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

No annotations are provided, placing the burden on the description. It describes the return format, implying a read-only calculation, but does not explicitly state behavioral traits like lack of side effects, idempotency, or authentication requirements.

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 extremely concise at two sentences. The first sentence states purpose and inputs, the second lists output and a pointer to related tools. No extraneous information.

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 simplicity (2 params, enum, output schema), the description covers the essentials: purpose, inputs, and output structure. It lacks usage guidance and behavioral details, but is largely complete for a straightforward calculator.

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% for both parameters. The description adds minimal extra meaning beyond the schema, listing return fields. With high coverage, baseline 3 is appropriate.

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 it calculates UK student loan repayments based on plan type and salary. It specifies the region (UK) and parameters, but does not explicitly differentiate from the sibling 'calculate_student_loan_repayment' or other calculator tools.

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 mentions 'See list_bundles for related finance-uk calculators', offering a mild usage hint. However, it lacks explicit guidance on when to use this tool versus alternatives, such as when to use UK vs US student loan calculators.

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