create_metafield_definition

WHAT IT DOES

What create_metafield_definition does on Kockatoos Shopify MCP Server

AI agents use create_metafield_definition to create or update resources in Kockatoos Shopify MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Kockatoos Shopify MCP Server environment.

WHY IT NEEDS A POLICY

Why create_metafield_definition needs a policy

This tool creates metadata schema definitions at the store level, which is a reversible Write operation. While it doesn't directly modify customer or financial data, it establishes structural rules that could affect how data is validated across the store.

From the tool's definition The tool 'create_metafield_definition' creates a new metafield definition, which is a store-level schema/structure that establishes validation rules. The description explicitly states 'Create a new metafield definition' indicating data creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_metafield_definition Rate-limited

create_metafield_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_metafield_definition": {
      "limits": [
        {
          "counter": "create_metafield_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 Kockatoos Shopify MCP Server, so you can run agents against it safely.

FAQ

Questions about create_metafield_definition

What does the create_metafield_definition tool do? +

Create a new metafield definition for products at the store level. Definitions establish structure and validation rules (e.g. allowed choices) for metafields. Use. It is categorised as a Write tool in the Kockatoos Shopify MCP Server 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_metafield_definition? +

Register the Kockatoos Shopify MCP Server MCP server in PolicyLayer and add a rule for create_metafield_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 Kockatoos Shopify MCP Server. Nothing to install.

What risk level is create_metafield_definition? +

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

Can I rate-limit create_metafield_definition? +

Yes. Add a rate_limit block to the create_metafield_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_metafield_definition completely? +

Set action: deny in the PolicyLayer policy for create_metafield_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_metafield_definition? +

create_metafield_definition is provided by the Kockatoos Shopify MCP Server MCP server (untitled-developers/shopify-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.