Create a QBO RefundReceipt (customer refund). Required: CustomerRef, DepositToAccountRef (the account the refund is drawn from — bank, credit card, or UF), and Line[].
AI agents use qbo_create_refund_receipt to commit financial operations through Kaizen Qbo — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Refunds represent irreversible financial transactions that commit a company to pay money to customers. This is the most severe category (Financial > Destructive > Execute) because it directly moves funds and creates financial obligations. The critical severity reflects the high blast radius: an AI agent with access to this tool could refund arbitrary amounts to arbitrary customers, causing direct monetary loss.
From the tool's definition Tool name includes 'create_refund' and description states it creates a 'customer refund' that is 'drawn from' a bank, credit card, or other account. This directly moves money out of a company's financial accounts to customers.
Attacks that exploit this kind of access
Create a QBO RefundReceipt (customer refund). Required: CustomerRef, DepositToAccountRef (the account the refund is drawn from — bank, credit card, or UF), and Line[]. It is categorised as a Financial tool in the Kaizen Qbo MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Kaizen Qbo MCP server in PolicyLayer and add a rule for qbo_create_refund_receipt: 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 Kaizen Qbo. Nothing to install.
qbo_create_refund_receipt 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 qbo_create_refund_receipt 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 qbo_create_refund_receipt. 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.
qbo_create_refund_receipt is provided by the Kaizen Qbo MCP server (kaizen-qbo-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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