adjust_inventory · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What adjust_inventory does on Shopify Graphql

AI agents use adjust_inventory 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 adjust_inventory needs a policy

Adjusting inventory quantities modifies stock levels in the Shopify store. This is a Write operation as inventory can be corrected if adjusted incorrectly. However, severity is high because incorrect inventory adjustments can cascade into overselling, stockouts, or financial discrepancies affecting order fulfillment and customer experience.

From the tool's definition Adjust inventory quantities

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

adjust_inventory Rate-limited

adjust_inventory 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": {
    "adjust_inventory": {
      "limits": [
        {
          "counter": "adjust_inventory_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 adjust_inventory

What does the adjust_inventory tool do? +

Adjust inventory quantities. 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 adjust_inventory? +

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

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

Can I rate-limit adjust_inventory? +

Yes. Add a rate_limit block to the adjust_inventory 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 adjust_inventory completely? +

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

adjust_inventory 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.