Execute uncollateralized flash loan (must repay + fee in same tx)
AI agents use granite_flash_loan to commit financial operations through Stacks AI MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
A flash loan is a financial operation that borrows and moves funds within a blockchain transaction. Even though it must be repaid in the same transaction, it involves real capital movement, fees, and can be used in complex DeFi exploits or arbitrage. It falls squarely in the Financial category with critical severity due to the potential for large capital exposure and misuse in adversarial scenarios.
From the tool's definition Execute uncollateralized flash loan (must repay + fee in same tx)
Attacks that exploit this kind of access
Execute uncollateralized flash loan (must repay + fee in same tx). It is categorised as a Financial tool in the Stacks AI MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Stacks AI MCP Server MCP server in PolicyLayer and add a rule for granite_flash_loan: 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 Stacks AI MCP Server. Nothing to install.
granite_flash_loan 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 granite_flash_loan 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 granite_flash_loan. 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.
granite_flash_loan is provided by the Stacks AI MCP Server MCP server (stack-ai-mcp/stacks-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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Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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