metabolic_age_calc

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

The description discloses a cost ($0.001 USDC via x402), which is a useful behavioral trait. However, with no annotations provided, it fails to explain what the tool does, what inputs it expects, or what outputs it returns.

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 short, but the first part is redundant with the tool name. The cost sentence is useful, yet the overall lack of substance is under-specification rather than effective conciseness.

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?

The description is grossly incomplete. It does not explain the calculation, required parameters, return format, or relationship to sibling tools. An agent would be unable to invoke this tool correctly.

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?

The input schema only has a generic 'params' object with no defined properties. The description adds no parameter details, leaving the agent with no idea what data to pass for metabolic age calculation.

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 merely repeats the tool name ('metabolic age calc') and assigns it to a generic category ('Other Utilities tool'). No verb or resource indicates what the tool actually does, making it a tautology.

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?

No guidance is provided on when to use this tool versus alternatives. It does not mention any prerequisites, context, or differentiate from sibling tools.

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