withdraw_cryptocurrency

THE RISK

Critical Risk

Why withdraw_cryptocurrency needs a policy

This tool irreversibly transfers cryptocurrency assets from an exchange account to a user-specified address. It commits financial value, cannot be easily reversed, and represents direct movement of money. The critical severity reflects that an AI agent with access to this tool could drain an account by withdrawing all funds to an attacker-controlled address.

From the tool's definition Tool name: 'withdraw_cryptocurrency' with description 'Initiates a cryptocurrency withdrawal to a specified address.' This directly initiates the transfer of funds from an exchange account to an external wallet, committing financial obligations and moving…

Documented attack patterns abuse exactly the kind of access withdraw_cryptocurrency gives an agent:

POLICY

How to control withdraw_cryptocurrency

PolicyLayer is an MCP gateway — it sits between your AI agents and CCXT MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for withdraw_cryptocurrency:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "withdraw_cryptocurrency": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to withdraw_cryptocurrency is blocked until a human approves it. The rest of the server keeps working.

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Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

Critical-risk tools in CCXT MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about withdraw_cryptocurrency

What does the withdraw_cryptocurrency tool do? +

Initiates a cryptocurrency withdrawal to a specified address. It is categorised as a Financial tool in the CCXT MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on withdraw_cryptocurrency? +

Register the CCXT MCP Server MCP server in PolicyLayer and add a rule for withdraw_cryptocurrency: 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 CCXT MCP Server. Nothing to install.

What risk level is withdraw_cryptocurrency? +

withdraw_cryptocurrency is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit withdraw_cryptocurrency? +

Yes. Add a rate_limit block to the withdraw_cryptocurrency 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.

How do I block withdraw_cryptocurrency completely? +

Set action: deny in the PolicyLayer policy for withdraw_cryptocurrency. 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.

What MCP server provides withdraw_cryptocurrency? +

withdraw_cryptocurrency is provided by the CCXT MCP Server MCP server (jcwleo/ccxt-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CCXT MCP Server tool call.

Start from CCXT MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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