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loan_amortization

Calculate loan repayment schedules showing principal and interest breakdowns over time for financial planning.

Instructions

Generate loan amortization schedule

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
principalYes
annualRateYesAnnual interest rate as decimal
yearsYes
paymentFrequencyNomonthly
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Generate' implies a calculation/read-only operation, but the description doesn't specify whether this creates persistent data, requires authentication, has rate limits, or what format the output takes. For a tool with 4 parameters and no annotations, this leaves significant behavioral questions unanswered.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient phrase with zero wasted words. It's perfectly front-loaded with the essential action and object. Every word earns its place in conveying the core purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 4-parameter calculation tool with no annotations and no output schema, the description is inadequate. It doesn't explain what an amortization schedule contains, the format of results, whether it's interactive or batch, or any behavioral characteristics. The context signals show significant documentation gaps that the description doesn't address.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is only 25% (only 'annualRate' has a description), so the description needs to compensate but doesn't mention any parameters. The description 'Generate loan amortization schedule' implies the core parameters (principal, rate, term) but doesn't explain their semantics, units, or constraints beyond what the minimal schema provides. This meets the baseline for moderate schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Generate loan amortization schedule' clearly states the verb ('Generate') and resource ('loan amortization schedule'), making the purpose immediately understandable. It distinguishes from most siblings which focus on analytics, taxes, or Excel operations, though it doesn't explicitly differentiate from similar financial calculation tools like 'excel_create_loan_analysis'.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention when to choose this over 'excel_create_loan_analysis' or other financial calculation tools, nor does it specify prerequisites or typical use cases for amortization schedules.

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

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