add_line_items_to_order · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What add_line_items_to_order does on Shopify Graphql

AI agents use add_line_items_to_order 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 add_line_items_to_order needs a policy

This tool modifies an existing order by adding line items, which is a reversible change to order state. While it affects business-critical data (orders), it does not delete data (Destructive), execute arbitrary code (Execute), or commit financial transactions directly (Financial) — those would require separate payment processing.

From the tool's definition Tool name 'add_line_items_to_order' and description 'Add line items to an order' indicate creation/modification of order data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_line_items_to_order Rate-limited

add_line_items_to_order 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": {
    "add_line_items_to_order": {
      "limits": [
        {
          "counter": "add_line_items_to_order_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 add_line_items_to_order

What does the add_line_items_to_order tool do? +

Add line items to an order. 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 add_line_items_to_order? +

Register the Shopify Graphql MCP server in PolicyLayer and add a rule for add_line_items_to_order: 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 add_line_items_to_order? +

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

Can I rate-limit add_line_items_to_order? +

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

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

add_line_items_to_order 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.