Mortgage Tools by Jenny
by jenny.mortgage · remote · no sign-in to list tools · v1.0.0 · published by mortgage.jenny
Canadian mortgage calculators: renewal offers, extra payments, break-or-stay, debt consolidation.
6 tools: 2 change things and 4 only read.
Scanned Oct 21, 2026
- Deletes or cancels0Claude Code: deny
- Can't be undone0Claude Code: ask
- Changes things2Claude Code: ask: see these tools
- Only reads4Claude Code: allow: see these tools
No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.
claude mcp add --transport http jenny-mortgage-tools https://mcp.jenny.mortgage/mcpTools
Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.
6 tools
Changes things 2Claude Code: ask
diagnose_mortgage_comparisonUse this first when a user wants a Canadian mortgage renewal, extra-payment, break-or-stay or debt-consolidation comparison but has not yet given the key figures.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Use this first when a user wants a Canadian mortgage renewal, extra-payment, break-or-stay or debt-consolidation comparison but has not yet given the key figures. From the facts already supplied, returns the missing ones in priority order and up to three questions to ask (balance, rate, remaining amortization, term, switching costs, lender-quoted penalty). Flags a request to borrow additional cash (cash-out refinance) as unsupported. Do not use when the figures are already supplied: call the matching calculator. Does not calculate, rank, check qualification or search rates.
Annotations the server declares
- title: Check missing Canadian mortgage facts
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
plan_mortgage_prepaymentsUse this when a user asks what paying extra on one Canadian mortgage would do: a higher regular payment, recurring extra payments, or up to 50 lump sums.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it Use this when a user asks what paying extra on one Canadian mortgage would do: a higher regular payment, recurring extra payments, or up to 50 lump sums. Compares the supplied mortgage with and without the extras: interest, debt left and modeled payoff period. Checks the extras against prepayment-privilege limits only when the user supplies them; otherwise reports the limits as not checked. Do not use to find a prepayment penalty or the cost of breaking a mortgage: no tool calculates a penalty, the lender quotes it. Results beyond the term need explicit monthly continuation assumptions.
Annotations the server declares
- title: Model extra payments on a Canadian mortgage
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
Only reads 4Claude Code: allow
compare_break_or_stayUse this when a user is partway through a Canadian mortgage term and asks whether to break the mortgage early (to refinance the same debt, switch lender or take a lower rate) or st…No findings
Why it is in this group
- The name "compare_break_or_stay" says "compare": a word for reading.
Description, as the server wrote it Use this when a user is partway through a Canadian mortgage term and asks whether to break the mortgage early (to refinance the same debt, switch lender or take a lower rate) or stay until the term ends. Compares keeping it with a user-supplied replacement offer, counting the lender-quoted penalty, such as an interest rate differential (IRD) or three months' interest. Shows cashflow payback separately from borrowing-cost crossover. Do not use to calculate or estimate a penalty: the lender must quote it, and an unknown penalty prevents an unconditional ranking. No cash-out or rate search.
Annotations the server declares
- title: Compare breaking or keeping a Canadian mortgage
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
compare_debt_consolidationUse this when a user asks about rolling other debts into a Canadian mortgage (debt consolidation), for example credit-card, car-loan or existing line-of-credit or HELOC balances, e…No findings
Why it is in this group
- The name "compare_debt_consolidation" says "compare": a word for reading.
Description, as the server wrote it Use this when a user asks about rolling other debts into a Canadian mortgage (debt consolidation), for example credit-card, car-loan or existing line-of-credit or HELOC balances, each entered with a fixed monthly payment or as interest-only. Compares three scenarios over a common horizon: keep the mortgage and debts, consolidate at the new minimum payment, and consolidate while keeping the same monthly repayment budget. Shows interest, debt left, fees and limits. Monthly mortgage payments only; 1 to 10 debts. Do not use for a new HELOC, additional cash-out or qualification: none is modeled.
Annotations the server declares
- title: Compare debt consolidation into a Canadian mortgage
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
compare_renewal_offersUse this when a user has two or three Canadian mortgage offers for the same balance, such as a renewal letter from the current lender and a quote to switch lender at renewal, and w…No findings
Why it is in this group
- The name "compare_renewal_offers" says "compare": a word for reading.
Description, as the server wrote it Use this when a user has two or three Canadian mortgage offers for the same balance, such as a renewal letter from the current lender and a quote to switch lender at renewal, and wants them compared. Compares the user-supplied rates, terms, amortizations, cashback and switching costs over a common horizon. Returns payments, interest, debt left, modeled borrowing cost and missing facts. Do not use for leaving a mortgage before the term ends (use compare_break_or_stay). Does not search or predict rates, confirm qualification or recommend a lender. An unknown cost is never treated as zero.
Annotations the server declares
- title: Compare Canadian mortgage renewal offers
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
get_mortgage_guideUse this when a user asks how to prepare for or understand a supported Canadian mortgage topic and is not asking for a calculation: renewal, switching costs, unequal terms, payment…No findings
Why it is in this group
- The name "get_mortgage_guide" says "get": a word for reading.
Description, as the server wrote it Use this when a user asks how to prepare for or understand a supported Canadian mortgage topic and is not asking for a calculation: renewal, switching costs, unequal terms, payment versus cost, renewal checklist, prepayments, break or stay, debt consolidation, or the calculation method. Returns one short, dated preparation guide written for Ontario and reviewed by an Ontario mortgage agent, with its public source, review status and follow-up questions. Do not use for general financial, legal or tax advice, current rates, arbitrary URLs or live web search.
Annotations the server declares
- title: Read an Ontario mortgage preparation guide
- readOnlyHint: true
- destructiveHint: false
- openWorldHint: false
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http jenny-mortgage-tools https://mcp.jenny.mortgage/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__jenny-mortgage-tools__compare_renewal_offers",
"mcp__jenny-mortgage-tools__compare_break_or_stay",
"mcp__jenny-mortgage-tools__compare_debt_consolidation",
"mcp__jenny-mortgage-tools__get_mortgage_guide"
],
"ask": [
"mcp__jenny-mortgage-tools__diagnose_mortgage_comparison",
"mcp__jenny-mortgage-tools__plan_mortgage_prepayments"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as jenny-mortgage-tools. Review it before you use it.