create_validation · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What create_validation does on Shopify Graphql

AI agents use create_validation 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_validation needs a policy

This tool creates a new validation rule, which is a reversible write operation that modifies Shopify store configuration. It does not execute arbitrary code (it uses Shopify Functions with limited scope), does not delete data, and does not directly move money.

From the tool's definition The tool is named 'create_validation' and described as 'Create a new cart/checkout validation rule using a Shopify Function', which indicates it creates a new configuration/rule object without deleting or modifying existing ones.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_validation Rate-limited

create_validation 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_validation": {
      "limits": [
        {
          "counter": "create_validation_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_validation

What does the create_validation tool do? +

Create a new cart/checkout validation rule 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_validation? +

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

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

Can I rate-limit create_validation? +

Yes. Add a rate_limit block to the create_validation 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_validation completely? +

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

create_validation 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.