void-invoice

THE RISK

Critical Risk

Why void-invoice needs a policy

Voiding an invoice is a destructive action that irreversibly removes or marks a financial record as invalid. This cannot be undone and affects accounting records, audit trails, and financial reporting. While it involves financial data, the primary risk is the destructive nature of the deletion rather than the movement of money itself.

From the tool's definition API to delete invoice by invoice id - the tool description explicitly states it deletes (void) an invoice, which is an irreversible financial document destruction operation.

Documented attack patterns abuse exactly the kind of access void-invoice gives an agent:

POLICY

How to control void-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 void-invoice:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "void-invoice"
  ]
}

void-invoice disappears from the agent's tool list entirely, and any attempt to call it is denied. 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.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More GoHighLevel MCP Server tools

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All 406 GoHighLevel MCP Server tools →

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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.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about void-invoice

What does the void-invoice tool do? +

API to delete invoice by invoice id. It is categorised as a Destructive tool in the GoHighLevel MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on void-invoice? +

Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for void-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 void-invoice? +

void-invoice is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit void-invoice? +

Yes. Add a rate_limit block to the void-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 void-invoice completely? +

Set action: deny in the PolicyLayer policy for void-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 void-invoice? +

void-invoice is provided by the GoHighLevel MCP Server MCP server (drausal/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.

Start from GoHighLevel MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →