Close Arkadiko vault and repay all debt
AI agents use arkadiko_close_vault 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.
Closing a vault on a DeFi protocol is a financial operation that commits funds (repays debt) and terminates a financial position. This is both financial (moves crypto assets, settles debt) and potentially irreversible (vault closure), making Financial the most severe applicable category. Misuse could result in unintended liquidation of collateral or loss of a leveraged position.
From the tool's definition 'Close Arkadiko vault and repay all debt' — irreversibly closes a DeFi vault position and repays outstanding debt obligations on a blockchain
Attacks that exploit this kind of access
Close Arkadiko vault and repay all debt. 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 arkadiko_close_vault: 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.
arkadiko_close_vault 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 arkadiko_close_vault 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 arkadiko_close_vault. 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.
arkadiko_close_vault 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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