create_pixel · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What create_pixel does on Shopify Graphql

AI agents use create_pixel 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_pixel needs a policy

The tool creates a new pixel, which is a reversible write operation. Pixels in Shopify are typically tracking/analytics elements that can be modified or removed if needed. While Write operations are generally lower risk than Execute or Destructive actions, this could have marketing/analytics implications if misconfigured (medium severity).

From the tool's definition create_pixel: Create a new pixel. The verb 'create' and explicit statement that it creates a new resource indicate a Write action that establishes data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_pixel Rate-limited

create_pixel 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_pixel": {
      "limits": [
        {
          "counter": "create_pixel_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_pixel

What does the create_pixel tool do? +

Create a new pixel. 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_pixel? +

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

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

Can I rate-limit create_pixel? +

Yes. Add a rate_limit block to the create_pixel 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_pixel completely? +

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

create_pixel 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.