reject_fulfillment_request · Shopify Graphql MCP

WHAT IT DOES

What reject_fulfillment_request does on Shopify Graphql

AI agents use reject_fulfillment_request 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 reject_fulfillment_request needs a policy

This tool modifies order fulfillment state by rejecting a request, which is reversible (the rejection could potentially be undone or the fulfillment reprocessed). It changes data but does not irreversibly delete records or move money.

From the tool's definition Tool name is 'reject_fulfillment_request' and description states it will 'Reject a fulfillment request for a fulfillment order'. Rejection is a state change operation that modifies the fulfillment order status.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reject_fulfillment_request Rate-limited

reject_fulfillment_request 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": {
    "reject_fulfillment_request": {
      "limits": [
        {
          "counter": "reject_fulfillment_request_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 reject_fulfillment_request

What does the reject_fulfillment_request tool do? +

Reject a fulfillment request for a fulfillment order. 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 reject_fulfillment_request? +

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

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

Can I rate-limit reject_fulfillment_request? +

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

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

reject_fulfillment_request 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.