Use this tool to compute the refund amount a customer should receive, following PageFly
AI agents use calculate_refund to commit financial operations through PageFly Refund MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool directly computes financial obligations—refund amounts—which represents a commitment of money back to customers. Even though it only calculates rather than processes the refund itself, miscalculation or misuse by an AI agent could result in incorrect refunds (over-refunding or under-refunding), affecting company finances and customer trust.
From the tool's definition Tool description explicitly states 'compute the refund amount a customer should receive' in a PageFly refund handling context. Server purpose is 'automates PageFly refund request handling' with 'refund calculation' as a core function.
Attacks that exploit this kind of access
Use this tool to compute the refund amount a customer should receive, following PageFly. It is categorised as a Financial tool in the PageFly Refund MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the PageFly Refund MCP Server MCP server in PolicyLayer and add a rule for calculate_refund: 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 PageFly Refund MCP Server. Nothing to install.
calculate_refund is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the calculate_refund 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 calculate_refund. 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.
calculate_refund is provided by the PageFly Refund MCP Server MCP server (nthieu002/refund-crisp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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