retirement_calc

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

There are no annotations, so the description must disclose behavior. It reveals that the tool costs $0.001 USDC via x402, but otherwise only says it is a retirement calculator, without mentioning what data it uses, whether it performs a pure computation, or what the response contains. The payment/rate-limit information is useful, but it does not cover the tool's execution behavior.

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 readable, but the first clause merely repeats the tool name and the second is a broad category label. Being concise does not offset the absence of substantive content; the only non-redundant information is the cost line. It is under-specified rather than efficiently complete.

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 finance calculator with no output schema and no annotations, this description is far from complete. It does not explain output format, example use cases, or required/optional parameters, and it sits in a list of hundreds of unrelated tools with no disambiguating detail. The cost note is the only specific contextual fact.

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 contains a generic 'params' object with no actual properties, and the description offers no hints about retirement-specific parameters like age, savings, or income. Since the nested params are undocumented and required is false, the agent cannot infer valid inputs. This fails to compensate for the schema's lack of detail.

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 only restates the tool name ('retirement calc') and vaguely labels it a 'Finance & Math tool.' It does not state what specific calculation or output the tool provides, so it fails to distinguish retirement_calc from sibling calculators like loan_calculator or investment_calculator.

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 given on when to use this tool, what inputs are expected, or how it differs from alternatives. The only practical note is the $0.001 USDC cost, which is an operational constraint, not usage direction. Sibling tools such as investment_calculator and compound_interest are not referenced.

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