investment_analysis__irr

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

Discloses the bisection method requirement and the sign-change precondition, but no annotations exist. Does not mention side effects (likely none), error handling, or output nature beyond the computation.

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?

Extremely brief (one sentence), which is efficient but omits critical details. Front-loads the method, but missing parameter and behavior info makes it less helpful.

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?

No output schema, no annotations, and only 0% schema coverage. Description does not cover return format, constraints beyond sign change, or edge cases. Incomplete for a 4-parameter tool.

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%. Description only mentions lo and hi; cashflows and tol are not explained. Falls short of adding meaning for 4 parameters.

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?

Description clearly states it computes IRR using bisection method, specifying the requirement of a sign change over an interval [lo, hi]. However, it does not explicitly define IRR as internal rate of return, which may be assumed but could be clearer for unfamiliar agents.

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 on when to use this tool versus other investment analysis siblings like NPV or payback period. Lacks any context about prerequisites or preferred scenarios.

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