sbtc_bridge_withdraw · Bitcoin wallet MCP server MCP

WHAT IT DOES

What sbtc_bridge_withdraw does on Bitcoin wallet MCP server

AI agents use sbtc_bridge_withdraw to commit financial operations through Bitcoin wallet MCP server — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why sbtc_bridge_withdraw needs a policy

This tool facilitates the conversion of sBTC tokens back to BTC through a bridge mechanism, which constitutes a financial operation involving asset movement between chains.

From the tool's definition 'withdrawal', 'converting sBTC back to BTC', 'bridge'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sbtc_bridge_withdraw Approval-gated

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

View as policy code

policy.json

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

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Bitcoin wallet MCP server, so you can run agents against it safely.

FAQ

Questions about sbtc_bridge_withdraw

What does the sbtc_bridge_withdraw tool do? +

Get withdrawal information for converting sBTC back to BTC. It is categorised as a Financial tool in the Bitcoin wallet MCP server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on sbtc_bridge_withdraw? +

Register the Bitcoin wallet MCP server MCP server in PolicyLayer and add a rule for sbtc_bridge_withdraw: 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 Bitcoin wallet MCP server. Nothing to install.

What risk level is sbtc_bridge_withdraw? +

sbtc_bridge_withdraw 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 sbtc_bridge_withdraw? +

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

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

sbtc_bridge_withdraw is provided by the Bitcoin wallet MCP server MCP server (markmhendrickson/mcp-server-bitcoin). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.