vo2max_calculator

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

With no annotations, the description carries the full burden of behavioral disclosure. It does state that this is an estimation using a named formula, which conveys a deterministic, read-only calculation. However, it does not explain why age is the only required parameter or what happens when maxHeartRate or restingHeartRate are omitted, leaving a meaningful behavioral gap.

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 short, front-loaded sentences with no filler. The formula name adds useful precision without 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 tool with four parameters, no annotations, no output schema, and no schema-level descriptions, the description is not complete enough for an agent to confidently invoke it correctly. The mismatch between the stated inputs ('max HR and resting HR') and the schema's required age leaves important uncertainty.

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, but it only names maxHeartRate and restingHeartRate. It says nothing about the required age parameter or the optional sex parameter, and it provides no units or value format guidance. The input semantics are therefore incomplete.

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 ('Estimate') and a clear resource ('VO2 Max'), and it names the exact formula ('Uth-Sørensen-Overstand'). This distinguishes it from sibling calculators and leaves no doubt about the tool's core function.

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 purpose implies when to use the tool — when a VO2 Max estimate is needed — but the description gives no explicit guidance on when not to use it or how it compares with siblings like target_heart_rate_calculator or running_pace_calculator. There is implied context but no exclusions or alternative routing.

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