SecureLend Market

compare_car_loans

Read-only

Search SecureLend's lender database for auto loan offers matching the user's criteria (loan amount, vehicle type, credit score, state). Returns available rates, terms, and eligibility indicators from participating lenders. Results may change over time and may include offers from SecureLend’s database and authorized third-party integrations when enabled. The user selects a lender and is directed to complete their application on the lender's own platform.

Input Schema

TableJSON Schema

Name	Required	Description
`isNew`	Yes	Specifies if the vehicle is new (true) or used (false).
`state`	No	The applicant's state of residence (2-letter code).
`loanAmount`	Yes	The desired auto loan amount in USD.
`creditScore`	No	The applicant's estimated credit score (300-850).

Output Schema

TableJSON Schema

Name	Required	Description	Default
`offers`	Yes
`summary`	Yes
`metadata`	Yes

TDQS

A4.1/5.0

Behavior4/5

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

The description adds valuable context beyond the annotations, including that results may change over time, may include offers from SecureLend and authorized third-party integrations, and that users are directed to complete applications on the lender's platform. These details align with readOnlyHint and openWorldHint annotations and enhance transparency.

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

Conciseness4/5

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

The description is efficiently structured, with the purpose front-loaded and each sentence serving a distinct role. There is minor redundancy in referring to 'SecureLend's database' twice, but overall it avoids filler.

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

Completeness4/5

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

Given the schema and output schema, the description is complete enough for an agent to understand what the tool does, key caveats about data volatility, and the user flow after selection. It covers essential behavioral notes without needing to restate structured schema information.

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?

The schema provides 100% parameter coverage, so the description doesn't need to add much. It lists the criteria (loan amount, vehicle type, credit score, state) that map to the schema parameters but introduces no new parameter-level details beyond the existing schema descriptions.

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

Purpose5/5

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

The description clearly states 'Search SecureLend's lender database for auto loan offers matching the user's criteria', using a specific verb and resource. It explicitly identifies the domain (auto loans) and distinguishes it from siblings like compare_personal_loans and compare_business_loans.

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

Usage Guidelines4/5

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

The description implies its use for comparing auto loan offers by naming the specific loan type and criteria. It does not explicitly exclude alternatives or name when-not-to-use cases, but the scope is clear from the description and sibling context.

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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TDQS

A4.1/5.0

Disambiguation4/5

Most tools have clear, distinct purposes, but there are a few potentially confusing pairs. Compare_personal_banking and compare_savings_accounts overlap somewhat, and calculate_loan_payment could be mistaken for covering mortgages despite calculate_mortgage_payment existing. Overall, descriptions help resolve most ambiguity.

Naming Consistency5/5

Tool names follow a consistent verb_noun pattern throughout: compare_* for comparisons, calculate_* for calculations, display_* for forms, submit_* for submissions, and get_* for offers. All names use lowercase with underscores, creating a predictable and uniform naming scheme.

Tool Count4/5

With 22 tools, the count is on the higher side but appropriate given the broad financial marketplace domain. Each tool covers a specific product category or workflow step, so the size feels justified rather than bloated. It is slightly heavy but not excessive for the scope.

Completeness4/5

The tool surface covers comparison, calculation, lead generation, prequalification, document upload, and status tracking, forming a comprehensive marketplace workflow. Minor gaps exist, such as no tools for updating or canceling applications, but these are workarounds and the core user journey is well supported.

Resources

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