complete_checkout · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What complete_checkout does on Shopify Graphql

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

WHY IT NEEDS A POLICY

Why complete_checkout needs a policy

This tool creates a new draft order from an abandoned checkout, which is a reversible data modification operation. While it involves financial implications (the draft order represents a potential purchase), it does not directly move money or commit financial obligations—it merely prepares an order for processing.

From the tool's definition Tool name 'complete_checkout' and description 'Convert an abandoned checkout to a draft order' indicates creating or modifying a draft order object in Shopify's system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

complete_checkout Rate-limited

complete_checkout 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": {
    "complete_checkout": {
      "limits": [
        {
          "counter": "complete_checkout_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 Shopify Graphql, so you can run agents against it safely.

FAQ

Questions about complete_checkout

What does the complete_checkout tool do? +

Convert an abandoned checkout to a draft order (for recovery). It is categorised as a Write tool in the Shopify Graphql MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on complete_checkout? +

Register the Shopify Graphql MCP server in PolicyLayer and add a rule for complete_checkout: 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 Shopify Graphql. Nothing to install.

What risk level is complete_checkout? +

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

Can I rate-limit complete_checkout? +

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

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

complete_checkout is provided by the Shopify Graphql MCP server (uvu-store/shopify-graphql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.