bns_register · Bitcoin wallet MCP server MCP: Risk & Policy

WHAT IT DOES

What bns_register does on Bitcoin wallet MCP server

AI agents use bns_register 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 bns_register needs a policy

Registering a BNS (Bitcoin Name System) name involves a blockchain transaction that commits financial resources (STX tokens as registration fees) on the Stacks network. This is an irreversible on-chain operation with financial obligation, making Financial the most severe applicable category. Misuse could result in unintended spending of cryptocurrency funds.

From the tool's definition Register a BNS name via Stacks contract call

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bns_register Approval-gated

Any call to bns_register 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": {
    "bns_register": {
      "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 bns_register

What does the bns_register tool do? +

Register a BNS name via Stacks contract call. 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 bns_register? +

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

bns_register 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 bns_register? +

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

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

bns_register 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.