sip_calc

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

No annotations are provided, so the description must carry full burden. It only says 'with compounding' but does not disclose compounding frequency (monthly?), rounding behavior, assumption about contributions being made at the start/end of period, or any error handling. For a financial calculator, these details are critical.

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?

Description is concise: one sentence for purpose followed by a tidy parameter list. It is front-loaded with the main action. However, the parameter descriptions are separate from the main text, which could be more integrated.

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?

Despite having an output schema (not shown), the description lacks context about what the output represents (total value, profits, etc.) and how compounding is applied (monthly? annual?). For a SIP calculator, typical output includes total investment, maturity amount, and returns. This gap makes the tool harder to use 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?

Schema coverage is 0%, so description must compensate. It provides clear but basic descriptions for each parameter: monthly_investment (amount), rate (annual return, example given), years (period). This adds meaning beyond schema types/titles but lacks details like permissible ranges or format.

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 clearly states it calculates SIP returns with compounding, which is a specific verb+resource. It distinguishes from generic financial calculators by focusing on Systematic Investment Plan, but does not explicitly differentiate from similar tools like compound_interest 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?

The description implies usage when calculating SIP returns, but provides no guidance on when to use this tool instead of alternatives like compound_interest or emi_calc. No when-not or context switching advice is given.

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