update_gift_card · Shopify Graphql MCP: Risk & Policy

WHAT IT DOES

What update_gift_card does on Shopify Graphql

AI agents use update_gift_card 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 update_gift_card needs a policy

The tool modifies gift card data without irreversible deletion. However, severity is high because gift cards represent financial value—unauthorized updates could alter balances, expiration dates, or disable valid cards, causing direct financial impact to customers.

From the tool's definition Tool name 'update_gift_card' and description 'Update an existing gift card' indicate modification of existing data. This is a reversible change to gift card records (balance, status, or metadata).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_gift_card Rate-limited

update_gift_card 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": {
    "update_gift_card": {
      "limits": [
        {
          "counter": "update_gift_card_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 update_gift_card

What does the update_gift_card tool do? +

Update an existing gift card. 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 update_gift_card? +

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

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

Can I rate-limit update_gift_card? +

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

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

update_gift_card 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.