create_cart_transform · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What create_cart_transform does on Shopify Graphql

AI agents use create_cart_transform 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 create_cart_transform needs a policy

The tool creates a new cart transform configuration via Shopify Function. This is a Write operation (creating/modifying store data reversibly). Severity is high because cart transforms can affect pricing, discounts, and customer checkout experience across the store, impacting revenue if misconfigured by an AI agent.

From the tool's definition Tool description states 'Create a new cart transform' — the verb 'create' indicates data creation. Cart transforms in Shopify are configurations that modify cart behavior/pricing, a reversible operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_cart_transform Rate-limited

create_cart_transform 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": {
    "create_cart_transform": {
      "limits": [
        {
          "counter": "create_cart_transform_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 create_cart_transform

What does the create_cart_transform tool do? +

Create a new cart transform using a Shopify Function. 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 create_cart_transform? +

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

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

Can I rate-limit create_cart_transform? +

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

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

create_cart_transform 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.