update_custom_pixel

Update an existing custom pixel

SERVERShopify Graphql SOURCEuvu-store/shopify-graphql-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/uvu-store-shopify-graphql-mcp/update-custom-pixel.md

WHAT IT DOES

What update_custom_pixel does on Shopify Graphql

AI agents use update_custom_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.

RISK

Why update_custom_pixel is rated Medium

This tool modifies an existing custom pixel configuration, which is a reversible operation typical of Write category tools. The severity is medium because misconfiguration of tracking pixels could affect store analytics and customer data collection, but the operation itself is not destructive or irreversible.

From the tool's definition Tool name is 'update_custom_pixel' and description states 'Update an existing custom pixel', indicating modification of existing data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_custom_pixel safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Shopify Graphql, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_custom_pixel, this is the rule to start with:

update_custom_pixel Rate-limited

update_custom_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": {
    "update_custom_pixel": {
      "limits": [
        {
          "counter": "update_custom_pixel_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Shopify Graphql, apply this rule, and every update_custom_pixel call is checked against it from then on.

FAQ

Questions about update_custom_pixel

What does the update_custom_pixel tool do? +

Update an existing custom 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 update_custom_pixel? +

Register the Shopify Graphql MCP server in PolicyLayer and add a rule for update_custom_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 update_custom_pixel? +

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

Can I rate-limit update_custom_pixel? +

Yes. Add a rate_limit block to the update_custom_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 update_custom_pixel completely? +

Set action: deny in the PolicyLayer policy for update_custom_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 update_custom_pixel? +

update_custom_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.

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