send_invoice

THE RISK

Critical Risk

Sending an invoice is a financial action that creates a binding monetary obligation between the business and customer. While it does not directly move money, it triggers a financial commitment and payment expectation.

From the tool's definition Tool name 'send_invoice' combined with description 'Send an invoice to customer' indicates the tool commits a financial obligation by formally issuing an invoice, which represents a monetary claim against a customer.

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

HOW TO CONTROL SEND_INVOICE

PolicyLayer is an MCP gateway — it sits between your AI agents and GoHighLevel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for send_invoice:

policy.json

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

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

Create a free account and register GoHighLevel MCP Server — 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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Go deeper

Critical-risk tools in GoHighLevel MCP Server → 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.
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FAQ

What does the send_invoice tool do? +

Send an invoice to customer. It is categorised as a Financial tool in the GoHighLevel MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on send_invoice? +

Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for send_invoice: 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 GoHighLevel MCP Server. Nothing to install.

What risk level is send_invoice? +

send_invoice 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 send_invoice? +

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

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

send_invoice is provided by the GoHighLevel MCP Server MCP server (mastanley13/gohighlevel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every GoHighLevel MCP Server tool call.

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// WHAT SEND_INVOICE ON GOHIGHLEVEL MCP SERVER DOES

// THE RISK

// HOW TO CONTROL SEND_INVOICE

// EXPLORE