binance_us_cust_undo_transfer

THE RISK

Critical Risk

This tool directly reverses financial transfers involving custodial accounts, which constitutes a financial operation. The ability to undo transfers of cryptocurrency or other assets held in custodial accounts represents a critical-severity risk due to: (1) direct manipulation of financial assets, (2) potential for unauthorized reversal of legitimate transactions, (3) high-value blast radius if misused by a…

From the tool's definition Tool name contains 'undo_transfer' and description states 'Undo a previous transfer from your custodial partner.' The 'REQUIRES CUSTODIAL SOLUTION API KEY' designation confirms this operates on financial accounts and custodial assets.

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

HOW TO CONTROL BINANCE_US_CUST_UNDO_TRANSFER

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

policy.json

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

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

Create a free account and register BNB Chain MCP — nothing to install.
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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All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
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FAQ

What does the binance_us_cust_undo_transfer tool do? +

Undo a previous transfer from your custodial partner. ⚠️ REQUIRES CUSTODIAL SOLUTION API KEY Use this to reverse a custodian transfer that hasn. It is categorised as a Financial tool in the BNB Chain MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on binance_us_cust_undo_transfer? +

Register the BNB Chain MCP server in PolicyLayer and add a rule for binance_us_cust_undo_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 BNB Chain MCP. Nothing to install.

What risk level is binance_us_cust_undo_transfer? +

binance_us_cust_undo_transfer 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 binance_us_cust_undo_transfer? +

Yes. Add a rate_limit block to the binance_us_cust_undo_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.

How do I block binance_us_cust_undo_transfer completely? +

Set action: deny in the PolicyLayer policy for binance_us_cust_undo_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.

What MCP server provides binance_us_cust_undo_transfer? +

binance_us_cust_undo_transfer is provided by the BNB Chain MCP server (nirholas/bnbchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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// WHAT BINANCE_US_CUST_UNDO_TRANSFER ON BNB CHAIN MCP DOES

// THE RISK

// HOW TO CONTROL BINANCE_US_CUST_UNDO_TRANSFER

// EXPLORE