car-loan-interest-deduction-calculator-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| calculate_car_loan_interest_deductionA | Calculates the 2025-2028 federal deduction for car loan interest created by the One Big Beautiful Bill Act (P.L. 119-21, IRC 163(h)(4)) the way IRS Schedule 1-A Part IV does: up to $10,000 of qualified passenger vehicle loan interest, then $200 off for each $1,000 or part of $1,000 of MAGI over $100,000 ($200,000 married filing jointly), so it reaches $0 at $149,001 ($249,001 joint). Checks the eligibility tests: loan originated after Dec 31 2024, new vehicle, final assembly in the US, personal use, car/minivan/van/SUV/pickup/motorcycle under 14,000 lb GVWR, first lien, not a lease. Available whether or not you itemize. Rules copied from the 2025 Schedule 1-A, Form 1040 instructions and IRS Notice 2025-57. |
| calculate_salt_deductionA | Calculates the deductible state and local tax (SALT) on Schedule A under the One Big Beautiful Bill Act cap (IRC 164(b)(6)-(7)): $40,000 for 2025 and $40,400 for 2026 ($20,000 / $20,200 married filing separately), rising 1% a year through 2029, reduced by 30% of MAGI over $500,000 (2025) or $505,000 (2026) but never below $10,000, then back to a flat $10,000 in 2030. Uses the IRS State and Local Tax Deduction Worksheet. Optionally compares itemizing with the standard deduction. Amounts copied from the 2025 Schedule A instructions, the 2026 draft Schedule A and the statute. |
| get_tax_brackets_and_standard_deductionA | Returns the official 2025 and 2026 federal income tax brackets and standard deductions after the One Big Beautiful Bill Act: 2026 standard deduction $16,100 single, $32,200 joint, $24,150 head of household (Rev. Proc. 2025-32), 2025 $15,750 / $31,500 / $23,625, plus the additional amount for age 65 or blind. Optionally computes the tax and marginal rate on a taxable income. Says plainly that 2027 amounts are not yet published (checked against the Internal Revenue Bulletin and irs-drop on 2026-11-02). |
| calculate_child_tax_creditA | Calculates the child tax credit as Schedule 8812 does after the One Big Beautiful Bill Act: $2,200 per qualifying child under 17 for 2025 and 2026, $500 per other dependent, reduced by 5% of MAGI over $400,000 joint / $200,000 others (excess rounded up to the next $1,000), limited by tax liability, with the refundable additional child tax credit of up to $1,700 per child at 15% of earned income over $2,500. Amounts from the 2025 Schedule 8812 and Rev. Proc. 2025-32. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 4 tools
Each tool maps to a clearly distinct tax provision (car loan interest, SALT, brackets/standard deduction, child tax credit), so an agent can select by topic without much risk of confusion. The only minor overlap is that standard deduction figures appear both in calculate_salt_deduction's itemize-vs-standard comparison and in get_tax_brackets_and_standard_deduction.
Three tools follow a clean calculate_<topic> pattern and the fourth uses get_<topic>, all in consistent snake_case with descriptive, domain-accurate nouns. The calculate/get verb mix is a small deviation but still predictable and readable.
Four tools is a lean but reasonable surface, and each covers a substantial, non-trivial calculation rather than a trivial wrapper. It sits slightly on the thin side, but nothing feels redundant or padded.
The tools cover car loan interest, SALT, brackets/standard deduction, and the child tax credit, which is coherent OBBBA/Schedule 1-A territory. However, other Schedule 1-A items (tips, overtime, senior deduction) and any return-level aggregation of these deductions are absent, leaving notable gaps for an agent computing a full picture.