density_calc

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

With no annotations supplied, the description carries the full burden of behavioral disclosure. It does mention the cost ($0.001 USDC via x402), which is a useful operational detail, but it omits side effects, input requirements, failure behavior, or what happens after payment.

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 short and front-loaded with the tool name and cost, with no filler words. However, brevity comes at the expense of essential semantic details, making it under-specified rather than appropriately concise.

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 lack of annotations, absence of an output schema, and the existence of many sibling calculator tools, this one-line description is incomplete. It does not state the formula, expected inputs, units, return format, or any example, which is insufficient for reliable selection and invocation.

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 exposes only a generic 'params' JSON object with no internal properties described, so an agent cannot know what arguments to pass. The description adds no parameter details, such as mass and volume fields or units, leaving the tool effectively unusable without external knowledge.

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 restates the tool name ('density calc') and labels it as 'Other Utilities tool' without a specific verb or explanation of what it computes. It fails to distinguish itself from the many sibling calculator utilities that also perform numeric calculations.

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 about when to use density_calc versus other calculators or utility tools. There are no prerequisites, alternatives, exclusion conditions, or usage context beyond the generic 'Other Utilities' label.

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