update_invoice

Update an 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/update-invoice.md

WHAT IT DOES

What update_invoice does on Businys

AI agents use update_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 update_invoice is rated Medium

This tool modifies invoice data, which are critical financial documents. While not destructive (invoices can be corrected), and not moving money directly, unauthorized updates to invoices represent a high-severity write operation with potential for fraud, billing errors, or financial disputes. Misuse could alter amounts, dates, or payment terms.

From the tool's definition Tool name 'update_invoice' and description 'Update an invoice' indicate modification of financial records. The sibling tools include 'invoices' (mentioned in server description) and financial management capabilities.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_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 update_invoice, this is the rule to start with:

update_invoice Rate-limited

update_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": {
    "update_invoice": {
      "limits": [
        {
          "counter": "update_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 update_invoice call is checked against it from then on.

FAQ

Questions about update_invoice

What does the update_invoice tool do? +

Update an invoice. 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 update_invoice? +

Register the Businys MCP server in PolicyLayer and add a rule for update_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 update_invoice? +

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

Can I rate-limit update_invoice? +

Yes. Add a rate_limit block to the update_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 update_invoice completely? +

Set action: deny in the PolicyLayer policy for update_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 update_invoice? +

update_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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