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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds no behavioral context such as what is returned, whether an amortization schedule is produced, rounding rules, or rate conventions.

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?

It is short and front-loads 'Loan amortization', but the trailing phrase 'client and server side from freedailypro' is unclear and does not earn its place. The sentence is concise but under-informative rather than structurally strong.

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 three-parameter calculation tool with no output schema and 0% parameter description coverage, the description should explain what is calculated and returned. Annotations cover safety, but the description leaves key invocation details unspecified.

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 description coverage is 0%, so the description must compensate for the three required parameters. It does not mention principal, annualRatePct, months, their units, or any constraints.

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 identifies the domain as 'Loan amortization', but it lacks a clear action verb such as calculate/generate and does not distinguish this tool from siblings like calculate_loan or converters_student_loan. The phrase 'client and server side from freedailypro' is ambiguous and adds little clarity.

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 explicit guidance on when to use this tool, when not to use it, or which sibling tool to choose for loan calculations. 'Client and server side' hints at execution context but does not function as usage guidance.

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