savings_goal_calc

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

With no annotations, the description carries the full burden of behavioral disclosure. It does disclose the $0.001 cost, which is a useful behavioral trait. However, it fails to describe what the tool actually does (e.g., computes required savings, returns a result) or any side effects, leaving agents to infer behavior from the name alone.

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 but not efficiently informative. The first clause 'savings goal calc' is redundant with the tool name, and the generic 'Finance & Math tool' adds no value. Only the cost sentence is useful, but overall the description is under-specified rather than 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?

This is a calculator tool with a generic input schema, no output schema, and no annotations. The description does not explain what the calculation does, what inputs are necessary, or what output to expect. It is completely inadequate for safe selection and invocation, especially among many similar siblings.

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 description says nothing about parameters. The input schema only provides a generic 'params' object with no individual fields documented, so agents have no idea what keys to pass for a savings goal calculation. The 100% schema coverage is misleading because it only covers the wrapper object, not the actual 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?

The description merely restates the tool name ('savings goal calc') and appends a generic category ('Finance & Math tool'). It does not state a specific verb+resource or distinguish this calculator from the numerous sibling finance tools like loan_calculator or retirement_calc.

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?

There is no guidance on when to use this tool versus other finance/math calculators. The only additional information is the cost, which is a pricing detail, not a usage guideline. No context or exclusions are provided.

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