btc_combine_utxos · Bitcoin wallet MCP server MCP

WHAT IT DOES

What btc_combine_utxos does on Bitcoin wallet MCP server

AI agents use btc_combine_utxos 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 btc_combine_utxos needs a policy

Combining/consolidating UTXOs involves creating and broadcasting a Bitcoin transaction that moves funds, which is a financial operation. Misuse could expose wallet structure, drain funds to an unintended address, or be used as a precursor to a theft. The 'all UTXOs' scope means the entire wallet balance is at risk, making this critical severity.

From the tool's definition Consolidate all UTXOs into a single output

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

btc_combine_utxos Approval-gated

Any call to btc_combine_utxos 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": {
    "btc_combine_utxos": {
      "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 btc_combine_utxos

What does the btc_combine_utxos tool do? +

Consolidate all UTXOs into a single output. 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 btc_combine_utxos? +

Register the Bitcoin wallet MCP server MCP server in PolicyLayer and add a rule for btc_combine_utxos: 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 btc_combine_utxos? +

btc_combine_utxos 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 btc_combine_utxos? +

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

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

btc_combine_utxos 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.