Transfer funds between the master account and a sub-account.
AI agents use account_transfer to commit financial operations through Mcp Kraken — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool irreversibly transfers cryptocurrency funds between accounts, making it a financial operation that commits financial obligations and moves assets. Even though the transfer may be reversible in practice through a counter-transfer, the tool itself performs an immediate, binding monetary movement.
From the tool's definition Tool description states: 'Transfer funds between the master account and a sub-account.' This directly moves money between accounts on a cryptocurrency exchange.
Attacks that exploit this kind of access
Transfer funds between the master account and a sub-account. It is categorised as a Financial tool in the Mcp Kraken MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Mcp Kraken MCP server in PolicyLayer and add a rule for account_transfer: 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 Mcp Kraken. Nothing to install.
account_transfer 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 account_transfer 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 account_transfer. 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.
account_transfer is provided by the Mcp Kraken MCP server (xavierbeheydt/mcp-kraken). 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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