loan

Loan / Amortization Calculator — Monthly payment, total paid and total interest for an amortizing loan.

SERVERGateway SOURCEhttps://wingmanprotocol.com/mcp

Low RISK CLASS

Category Read

Parameters 42 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-wingmanprotocol-agent-gateway/loan.md

WHAT IT DOES

What loan does on Gateway

AI agents call loan to retrieve information from Gateway without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`principal`	number	Yes	Loan principal in USD
`term_years`	number	—	Loan term in years (used if term_months omitted)
`term_months`	integer	—	Loan term in months (or use term_years)
`annual_rate_pct`	number	Yes	Annual interest rate as a PERCENT (6 = 6%)

Parameters from the server's own tool schema.

RISK

Why loan is rated Low

This tool performs read-only calculations to compute loan amortization figures. It does not move money, create obligations, modify data, or execute commands. It is a calculator that returns derived financial metrics from input parameters.

From the tool's definition Monthly payment, total paid and total interest for an amortizing loan — purely a financial calculation/query with no side effects

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs loan safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Gateway, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For loan, this is the rule to start with:

loan Allowed

loan is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "loan": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Gateway, apply this rule, and every loan call is checked against it from then on.

FAQ

Questions about loan

What does the loan tool do? +

Loan / Amortization Calculator — Monthly payment, total paid and total interest for an amortizing loan. It is categorised as a Read tool in the Gateway MCP Server, which means it retrieves data without modifying state.

What parameters does loan accept? +

loan accepts 4 parameters: principal, term_years, term_months, annual_rate_pct. Required: principal, annual_rate_pct. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on loan? +

Register the Gateway MCP server in PolicyLayer and add a rule for loan: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Gateway. Nothing to install.

What risk level is loan? +

loan is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit loan? +

Yes. Add a rate_limit block to the loan rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block loan completely? +

Set action: deny in the PolicyLayer policy for loan. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides loan? +

loan is provided by the Gateway MCP server (https://wingmanprotocol.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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