create_invoice

SERVERBusinys SOURCE@businys/mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/app-businys-mcp-server/create-invoice.md

WHAT IT DOES

What create_invoice does on Businys

AI agents use create_invoice to create or update resources in Businys, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Businys environment.

RISK

Why create_invoice is rated Medium

This tool creates a new invoice record in draft status. It is reversible (invoices can be voided, archived, or modified before sending), so it does not qualify as Destructive. It does not move money or create financial obligations until sent (status: sent → viewed → paid), so it is not Financial at the creation stage.

From the tool's definition Tool description states 'Create a new invoice (draft — not visible to client until sent)' and 'Returns the new invoice ID, number, and public slug.' The verb 'Create' and the clear data creation operation indicate write functionality.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_invoice safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Businys, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_invoice, this is the rule to start with:

create_invoice Rate-limited

create_invoice stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_invoice": {
      "limits": [
        {
          "counter": "create_invoice_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Businys, apply this rule, and every create_invoice call is checked against it from then on.

FAQ

Questions about create_invoice

What does the create_invoice tool do? +

Create a new invoice (draft \u2014 not visible to client until sent). Returns the new invoice ID, number, and public slug. Valid statuses: draft \u2192 sent \u2192 viewed \u2192 paid \u2192 overdue \u2192 voided. It is categorised as a Write tool in the Businys MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_invoice? +

Register the Businys MCP server in PolicyLayer and add a rule for create_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 Businys. Nothing to install.

What risk level is create_invoice? +

create_invoice is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_invoice? +

Yes. Add a rate_limit block to the create_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 create_invoice completely? +

Set action: deny in the PolicyLayer policy for create_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 create_invoice? +

create_invoice is provided by the Businys MCP server (@businys/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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