calculate_timesheet

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

With no annotations present, the description carries the full burden; it does contribute real behavioral facts by calling itself 'stateless' and 'public' (no persistence, no auth) and by disclosing that a preview URL is produced. It omits error behavior, whether entries are validated, and how currency/tax defaults behave.

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?

A single dense sentence with the key scope front-loaded and zero filler. It is efficient, though for a six-parameter tool it is arguably under-sized rather than over-sized.

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?

Six parameters at 0% schema coverage, no annotations, and no output schema mean the description is the only source of semantics — and it addresses none of the parameter-level questions. Mentioning the preview URL partially covers the return value, but not enough for a computational tool of this complexity.

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 0%, so the description must compensate and largely does not. It gestures at the concepts (hours, rates, tax deductions) but never explains currency defaulting to EUR, tax_rate defaulting to 0, the optional client_name, or the expected format of entry dates.

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?

Uses a specific verb ('calculates') with a concrete resource list: billable hours, rates, tax deductions, and an A4 timesheet preview URL. The purpose is unambiguous, though it never explicitly contrasts itself with the invoice-oriented siblings such as generate_free_invoice.

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 phrase 'stateless public tool' implies no auth or persistence, but there is no statement of when to use this over generate_free_invoice or what prerequisites exist. An agent must infer the boundary from the name alone.

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