AI agents call calc_mortgage to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
years | number | Yes | |
principal | number | Yes | |
annual_rate | number | Yes |
Parameters from the server's own tool schema.
This tool performs a mathematical calculation based on input parameters (loan amount, interest rate, term, etc.) and returns a computed value. It is purely informational with no side effects, no data creation or modification, no code execution, and no financial transactions. It falls squarely within the Read category as a calculation/query operation.
From the tool's definition Tool name 'calc_mortgage' and description 'Calculate monthly mortgage repayment' indicate a computational/analytical operation that retrieves a calculated result without modifying any data or executing external actions.
Attacks that exploit this kind of access
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. Required: 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 (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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