wave_mark_invoice_sent · Waveapps MCP: Risk & Policy

WHAT IT DOES

What wave_mark_invoice_sent does on Waveapps

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

WHY IT NEEDS A POLICY

Why wave_mark_invoice_sent needs a policy

This tool changes the status of an existing financial record (invoice). The change is reversible (an invoice can be marked unsent or its status reverted), so it is Write rather than Destructive.

From the tool's definition Flips an approved invoice — modifies the invoice's status/state from 'approved' to 'sent', a reversible state change in the accounting system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wave_mark_invoice_sent Rate-limited

wave_mark_invoice_sent 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": {
    "wave_mark_invoice_sent": {
      "limits": [
        {
          "counter": "wave_mark_invoice_sent_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Waveapps, so you can run agents against it safely.

FAQ

Questions about wave_mark_invoice_sent

What does the wave_mark_invoice_sent tool do? +

Flips an approved invoice\. It is categorised as a Write tool in the Waveapps MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on wave_mark_invoice_sent? +

Register the Waveapps MCP server in PolicyLayer and add a rule for wave_mark_invoice_sent: 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 Waveapps. Nothing to install.

What risk level is wave_mark_invoice_sent? +

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

Can I rate-limit wave_mark_invoice_sent? +

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

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

wave_mark_invoice_sent is provided by the Waveapps MCP server (lunaparker/waveapps-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.