Wait for payment confirmation after a payment request has been sent. Optionally specify a game to get direct access after payment.
AI agents use confirm_payment to commit financial operations through Sphere MCP Gaming Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool confirms and finalizes payment transactions on a blockchain, which constitutes committing a financial obligation. Payments on blockchain are typically irreversible, making misuse potentially both Financial and Destructive in nature. The Financial category takes precedence as the primary action is confirming a monetary payment.
From the tool's definition 'Wait for payment confirmation after a payment request has been sent' and 'payment-gated day pass system' and 'payment processing via Nostr protocol and Unicity blockchain'
Attacks that exploit this kind of access
Wait for payment confirmation after a payment request has been sent. Optionally specify a game to get direct access after payment. It is categorised as a Financial tool in the Sphere MCP Gaming Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Sphere MCP Gaming Server MCP server in PolicyLayer and add a rule for confirm_payment: 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 Sphere MCP Gaming Server. Nothing to install.
confirm_payment 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 confirm_payment 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 confirm_payment. 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.
confirm_payment is provided by the Sphere MCP Gaming Server MCP server (mastap/unicity-mcp-gaming). 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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