investment_calculator

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

No annotations; description lacks details on compound frequency, whether result is future value, or assumptions. Minimal beyond parameter names and basic function.

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?

Concise with bulleted parameter list, front-loaded main purpose. No fluff, but could be slightly more structured with outcome description.

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?

Covers inputs and basic function; output schema exists so return shape is documented. Lacks assumptions (e.g., compounding frequency), but sufficient for use.

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 coverage is 0%, but description adds clear, helpful definitions for each parameter (e.g., 'rate — Expected annual return rate (e.g. 7.0 for 7%)'), which compensates well.

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?

Clearly states it calculates investment growth using compound interest with optional monthly contributions. Distinguishes from compound_interest and loan/mortgage calculators.

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?

Implies usage for investment growth calculations but provides no explicit when-to-use or when-not-to-use guidance compared to sibling tools like compound_interest or simple_interest_calc.

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