Refund a transaction. Supports full or partial refunds.
AI agents use unified_refund to commit financial operations through Africa Payments MCP — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Refunds directly move money back to customers, constituting a financial obligation and transaction. This is a core financial operation with high blast radius: an AI agent with access could issue unauthorized refunds, deplete merchant accounts, or commit fraud. The tool operates on real payment infrastructure serving major African providers, making misuse potentially devastating.
From the tool's definition Tool description states 'Refund a transaction' which involves reversing money movements. The server context emphasizes 'process payments' and 'manage transactions' across African payment providers (M-Pesa, Paystack, MTN MoMo).
Attacks that exploit this kind of access
Refund a transaction. Supports full or partial refunds. It is categorised as a Financial tool in the Africa Payments MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Africa Payments MCP server in PolicyLayer and add a rule for unified_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 Africa Payments MCP. Nothing to install.
unified_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 unified_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 unified_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.
unified_refund is provided by the Africa Payments MCP server (kenyaclaw/africa-payments-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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