create_metaobject_definition · Shopify Graphql MCP

WHAT IT DOES

What create_metaobject_definition does on Shopify Graphql

AI agents use create_metaobject_definition 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_metaobject_definition needs a policy

The tool creates (Write) rather than retrieves (Read) or executes arbitrary code (Execute). Creating metadata structure is reversible through deletion, so not Destructive. No financial transactions involved. Severity is medium because misconfigured metaobject definitions could impact data integrity and store operations, but the blast radius is limited to schema/structure rather than data loss or financial harm.

From the tool's definition Creates a new metaobject definition, which establishes structure for custom data objects. This is a creation operation that modifies store configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_metaobject_definition Rate-limited

create_metaobject_definition 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_metaobject_definition": {
      "limits": [
        {
          "counter": "create_metaobject_definition_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_metaobject_definition

What does the create_metaobject_definition tool do? +

Create a new metaobject definition that establishes the structure for custom data objects. 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_metaobject_definition? +

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

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

Can I rate-limit create_metaobject_definition? +

Yes. Add a rate_limit block to the create_metaobject_definition 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_metaobject_definition completely? +

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

create_metaobject_definition 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.