Undo a previous transfer from your custodial partner. ⚠️ REQUIRES CUSTODIAL SOLUTION API KEY Use this to reverse a custodian transfer that hasn
AI agents use binance_us_cust_undo_transfer to commit financial operations through Binance US MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool moves cryptocurrency funds by reversing/undoing a prior transfer, which constitutes a financial operation that commits obligations and affects account balances. While the tool itself may be reversible (as 'undo' suggests), it directly manipulates cryptocurrency holdings and custodial transfers, making it Financial category.
From the tool's definition Tool description states it undoes a previous transfer from a custodial partner. The server description indicates it handles 'wallet operations' and 'sub-account transfers'.
Documented attack patterns abuse exactly the kind of access binance_us_cust_undo_transfer gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Binance US MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for binance_us_cust_undo_transfer:
{
"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.
Free to start. No card required.
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 Binance US MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Binance US MCP Server 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 Binance US MCP Server. Nothing to install.
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.
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.
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.
binance_us_cust_undo_transfer is provided by the Binance US MCP Server MCP server (nirholas/binance-us-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Binance US MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
93 Binance US MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.