This record as markdown: /tools/creativelead-unclick/calc-mortgage.md
What calc_mortgage does on UnClick
AI agents call calc_mortgage to retrieve information from UnClick 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 |
|---|---|---|---|
years | number | — | |
principal | number | — | |
annual_rate | number | — |
Parameters from the server's own tool schema.
Why calc_mortgage is rated Low
This tool performs a mathematical calculation based on input parameters (loan amount, interest rate, term, etc.) and returns a computed result. It retrieves no external data, creates no records, executes no commands, and modifies nothing. It is a read-only informational tool with minimal security risk.
From the tool's definition Tool name 'calc_mortgage' and description 'Calculate monthly mortgage repayment' indicate a pure calculation/query operation with no side effects, data modification, or external state changes.
Attacks that exploit this kind of access
The rule that runs calc_mortgage safely
PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For calc_mortgage, this is the rule to start with:
calc_mortgage is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every calc_mortgage call is checked against it from then on.
Questions about calc_mortgage
Calculate monthly mortgage repayment. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
calc_mortgage accepts 3 parameters: years, principal, annual_rate. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for calc_mortgage: 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 UnClick. Nothing to install.
calc_mortgage is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the calc_mortgage 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.
Set action: deny in the PolicyLayer policy for calc_mortgage. 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.
calc_mortgage is provided by the UnClick MCP server (creativelead/unclick). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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