Get the next invoice number for the given location
AI agents call generate-invoice-number to retrieve information from GoHighLevel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves a generated invoice number for display or reference purposes. It does not create an invoice, commit any financial transaction, or modify any data. It is purely a read/fetch operation, though it may increment an internal counter (hence slight uncertainty). Severity is low as the blast radius of retrieving an invoice number is minimal.
From the tool's definition 'Get the next invoice number for the given location' - this is a read/query operation that retrieves the next available invoice number without creating or modifying any data
Documented attack patterns abuse exactly the kind of access generate-invoice-number gives an agent:
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 generate-invoice-number:
{
"version": "1",
"default": "deny",
"tools": {
"generate-invoice-number": {}
}
}generate-invoice-number is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the next invoice number for the given location. It is categorised as a Read tool in the GoHighLevel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GoHighLevel MCP Server MCP server in PolicyLayer and add a rule for generate-invoice-number: 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.
generate-invoice-number is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the generate-invoice-number 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.
Set action: deny in the PolicyLayer policy for generate-invoice-number. 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.
generate-invoice-number 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.
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.
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406 GoHighLevel MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.