isw_pay_vas_bill
Pay a VAS bill. Provide amountNaira or amountKobo explicitly. Requires confirm: true.
This record as markdown: /tools/io-github-dairus01-interswitch-mcp-server/isw-pay-vas-bill.md
What isw_pay_vas_bill does on Interswitch
AI agents use isw_pay_vas_bill to commit financial operations through Interswitch, usually the final step of a payment, billing, or trading workflow. A call moves real money.
Why isw_pay_vas_bill is rated Critical
This tool directly processes financial transactions by paying bills with explicit monetary amounts. It requires a confirm parameter, suggesting intentional transaction commitment. The capacity to move money or commit financial obligations makes it Financial category. Given the critical nature of unsupervised bill payments (potential for large unauthorized transfers, fraud, or financial loss), severity is critical.
From the tool's definition Tool name contains 'pay' and description states 'Pay a VAS bill' with amount parameters (amountNaira or amountKobo), indicating movement of money.
Attacks that exploit this kind of access
The rule that runs isw_pay_vas_bill safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Interswitch, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For isw_pay_vas_bill, this is the rule to start with:
Any call to isw_pay_vas_bill is blocked until a human approves it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Interswitch, apply this rule, and every isw_pay_vas_bill call is checked against it from then on.
Questions about isw_pay_vas_bill
Pay a VAS bill. Provide amountNaira or amountKobo explicitly. Requires confirm: true. It is categorised as a Financial tool in the Interswitch MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Interswitch MCP server in PolicyLayer and add a rule for isw_pay_vas_bill: 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 Interswitch. Nothing to install.
isw_pay_vas_bill 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 isw_pay_vas_bill 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 isw_pay_vas_bill. 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.
isw_pay_vas_bill is provided by the Interswitch MCP server (interswitch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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