# update_discount_code

Update an existing discount code

Agent View of the PolicyLayer registry record for `update_discount_code`. HTML page: https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/update-discount-code

## Facts

- Tool: `update_discount_code`
- Server: Shopify Graphql (`uvu-store/shopify-graphql-mcp`) — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp.md
- Homepage: https://github.com/UVU-Store/shopify-graphql-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "update_discount_code",
    "arguments": {}
  }
}
```

## Why update_discount_code is rated Medium

Updating discount codes is a reversible write operation that modifies store pricing rules and promotional offers. While not destructive (codes can be reverted) or financial (doesn't move money directly), it can significantly impact revenue by altering discount terms.

From the tool's own definition: "Tool name 'update_discount_code' with description 'Update an existing discount code' indicates modification of discount configuration."

## Use case

AI agents use update_discount_code 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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Shopify Graphql:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_discount_code": {
      "limits": [
        {
          "counter": "update_discount_code_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Shopify Graphql (318)

- `cancel_fulfillment_order` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/cancel-fulfillment-order.md
- `cancel_order` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/cancel-order.md
- `cancel_subscription_contract` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/cancel-subscription-contract.md
- `delete_app_proxy` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-app-proxy.md
- `delete_cart_transform` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-cart-transform.md
- `delete_channel` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-channel.md
- `delete_collection` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-collection.md
- `delete_company` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-company.md
- `delete_company_contact` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-company-contact.md
- `delete_custom_fulfillment_service` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-custom-fulfillment-service.md
- `delete_custom_pixel` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-custom-pixel.md
- `delete_customer` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-customer.md
- `delete_customer_address` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-customer-address.md
- `delete_delivery_customization` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-delivery-customization.md
- `delete_delivery_option_generator` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-delivery-option-generator.md
- `delete_discount` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-discount.md
- `delete_draft_order` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-draft-order.md
- `delete_file` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-file.md
- `delete_fulfillment_constraint_rule` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-fulfillment-constraint-rule.md
- `delete_location` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-location.md
- `delete_market` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-market.md
- `delete_marketing_engagements` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-marketing-engagements.md
- `delete_marketing_event` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-marketing-event.md
- `delete_menu` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-menu.md
- `delete_metaobject` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-metaobject.md
- `delete_metaobject_definition` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-metaobject-definition.md
- `delete_order` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-order.md
- `delete_packing_slip_template` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-packing-slip-template.md
- `delete_page` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-page.md
- `delete_payment_customization` — Destructive — https://policylayer.com/tools/uvu-store-shopify-graphql-mcp/delete-payment-customization.md
- …and 288 more: https://policylayer.com/tools/uvu-store-shopify-graphql-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=uvu-store-shopify-graphql-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/uvu-store-shopify-graphql-mcp