BinanceSubAccountTransferToMaster

THE RISK

Critical Risk

This tool directly moves financial assets (crypto/tokens) between accounts. Asset transfers commit financial obligations and represent irreversible movement of funds, making this a Financial category risk. Severity is critical because an AI agent misusing this tool could drain sub-accounts to a master account, resulting in loss of control over those funds or unauthorized transfers.

From the tool's definition Tool name 'BinanceSubAccountTransferToMaster' and description 'Transfer assets from a sub-account back to the master account' indicate movement of assets/funds between accounts.

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

HOW TO CONTROL BINANCESUBACCOUNTTRANSFERTOMASTER

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 BinanceSubAccountTransferToMaster:

policy.json

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

Any call to BinanceSubAccountTransferToMaster 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 1240 BNB Chain MCP tools →

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Go deeper

Critical-risk tools in BNB Chain MCP → 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.
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FAQ

What does the BinanceSubAccountTransferToMaster tool do? +

Transfer assets from a sub-account back to the master account. 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 BinanceSubAccountTransferToMaster? +

Register the BNB Chain MCP server in PolicyLayer and add a rule for BinanceSubAccountTransferToMaster: 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 BinanceSubAccountTransferToMaster? +

BinanceSubAccountTransferToMaster 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 BinanceSubAccountTransferToMaster? +

Yes. Add a rate_limit block to the BinanceSubAccountTransferToMaster 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 BinanceSubAccountTransferToMaster completely? +

Set action: deny in the PolicyLayer policy for BinanceSubAccountTransferToMaster. 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 BinanceSubAccountTransferToMaster? +

BinanceSubAccountTransferToMaster 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.

Enforce policy on every BNB Chain MCP tool call.

Deterministic rules across all 1240 BNB Chain MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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BinanceSubAccountTransferToMaster

// WHAT BINANCESUBACCOUNTTRANSFERTOMASTER ON BNB CHAIN MCP DOES

// THE RISK

// HOW TO CONTROL BINANCESUBACCOUNTTRANSFERTOMASTER

// EXPLORE