Request cancellation of a pending withdrawal.
AI agents call cancel_withdrawal to permanently remove resources in Mcp Kraken — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Although cancel_withdrawal itself does not delete data, it irreversibly cancels a financial transaction in progress. This matches the Destructive category because the action cannot be reversed—a cancelled withdrawal cannot simply be restored without re-initiating the entire process.
From the tool's definition The tool performs 'cancellation of a pending withdrawal', which is an irreversible state change to a financial transaction. Once cancelled, the withdrawal request cannot be restored to its prior pending state, and the operation cannot be undone.
Attacks that exploit this kind of access
Request cancellation of a pending withdrawal. It is categorised as a Destructive tool in the Mcp Kraken MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mcp Kraken MCP server in PolicyLayer and add a rule for cancel_withdrawal: 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.
cancel_withdrawal is a Destructive 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 cancel_withdrawal 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 cancel_withdrawal. 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.
cancel_withdrawal 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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