send_draft_order_invoice

THE RISK

High Risk

Why send_draft_order_invoice needs a policy

This tool triggers an external operation (sending an email to a customer) and changes the draft order's status. It is not purely a write/read operation — it initiates an external communication and causes a state transition, making Execute the most appropriate category. Misuse could result in unwanted emails being sent to customers and unintended status changes on orders.

From the tool's definition 'Send an invoice email for a draft order. Side effect: sends email to customer; draft status becomes'

Documented attack patterns abuse exactly the kind of access send_draft_order_invoice gives an agent:

POLICY

How to control send_draft_order_invoice

PolicyLayer is an MCP gateway — it sits between your AI agents and Sapo, and nothing reaches the server without passing your rules. This is the rule we recommend for send_draft_order_invoice:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "send_draft_order_invoice": {
      "limits": [
        {
          "counter": "send_draft_order_invoice_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

send_draft_order_invoice stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Sapo — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

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EXPLORE

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Go deeper

High-risk tools in Sapo → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-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.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about send_draft_order_invoice

What does the send_draft_order_invoice tool do? +

Send an invoice email for a draft order. Side effect: sends email to customer; draft status becomes. It is categorised as a Execute tool in the Sapo MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on send_draft_order_invoice? +

Register the Sapo MCP server in PolicyLayer and add a rule for send_draft_order_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 Sapo. Nothing to install.

What risk level is send_draft_order_invoice? +

send_draft_order_invoice is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit send_draft_order_invoice? +

Yes. Add a rate_limit block to the send_draft_order_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 send_draft_order_invoice completely? +

Set action: deny in the PolicyLayer policy for send_draft_order_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 send_draft_order_invoice? +

send_draft_order_invoice is provided by the Sapo MCP server (nguyennguyenit/sapo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sapo tool call.

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

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