open_payment_channel · Tenzro Ledger MCP: Risk & Policy

WHAT IT DOES

What open_payment_channel does on Tenzro Ledger MCP

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

WHY IT NEEDS A POLICY

Why open_payment_channel needs a policy

This tool initiates a financial operation by opening a payment channel and committing an initial deposit of funds. It directly moves or locks financial assets, making it a Financial category tool. The blast radius is critical because misuse could result in loss of funds or unauthorized financial commitments.

From the tool's definition "Open an off-chain micropayment channel with an initial deposit"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

open_payment_channel Approval-gated

Any call to open_payment_channel 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": {
    "open_payment_channel": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about open_payment_channel

What does the open_payment_channel tool do? +

Open an off-chain micropayment channel with an initial deposit. It is categorised as a Financial tool in the Tenzro Ledger MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on open_payment_channel? +

Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for open_payment_channel: 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 Tenzro Ledger MCP. Nothing to install.

What risk level is open_payment_channel? +

open_payment_channel 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 open_payment_channel? +

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

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

open_payment_channel is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.