binance_us_cust_undo_transfer

THE RISK

Critical Risk

Why binance_us_cust_undo_transfer needs a policy

This tool directly manipulates financial transfers involving a custodial partner. Even though the specific action is a reversal (undo), it still commits financial obligations and affects asset positions. In a DeFi ecosystem dealing with stablecoins and custody, any tool that moves or reverses the movement of funds between accounts is Financial risk.

From the tool's definition Tool name and description explicitly state 'transfer' and 'custodian transfer' in a DeFi/crypto context, which inherently involves moving assets/funds. The purpose is to 'undo a previous transfer from your custodial partner,' reversing financial movements.

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

POLICY

How to control binance_us_cust_undo_transfer

PolicyLayer is an MCP gateway — it sits between your AI agents and Sperax Ecosystem Crypto & DeFI MCP Server, 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 Sperax Ecosystem Crypto & DeFI MCP Server — 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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Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
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FAQ

Questions about binance_us_cust_undo_transfer

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 Sperax Ecosystem Crypto & DeFI MCP Server 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 Sperax Ecosystem Crypto & DeFI 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 Sperax Ecosystem Crypto & DeFI MCP Server. 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 Sperax Ecosystem Crypto & DeFI MCP Server MCP server (sperax/sperax-crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sperax Ecosystem Crypto & DeFI MCP Server tool call.

Start from Sperax Ecosystem Crypto & DeFI 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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