update_webhook_subscription

Update an existing webhook subscription. You can change the endpoint URL, filters, included fields, or metafield namespaces without recreating the subscription.

SERVERShopify Graphql SOURCEuvu-store/shopify-graphql-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/uvu-store-shopify-graphql-mcp/update-webhook-subscription.md

WHAT IT DOES

What update_webhook_subscription does on Shopify Graphql

AI agents use update_webhook_subscription 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.

RISK

Why update_webhook_subscription is rated Medium

This tool modifies webhook subscriptions, which are configuration objects that determine what events trigger notifications and where they are sent. Updating webhook endpoints or filters could redirect sensitive store events to attacker-controlled servers or disable critical notifications.

From the tool's definition Tool description states it can "Update an existing webhook subscription" and "change the endpoint URL, filters, included fields, or metafield namespaces." This modifies configuration that controls how Shopify sends data to external endpoints.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_webhook_subscription safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Shopify Graphql, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_webhook_subscription, this is the rule to start with:

update_webhook_subscription Rate-limited

update_webhook_subscription 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_webhook_subscription": {
      "limits": [
        {
          "counter": "update_webhook_subscription_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Shopify Graphql, apply this rule, and every update_webhook_subscription call is checked against it from then on.

FAQ

Questions about update_webhook_subscription

What does the update_webhook_subscription tool do? +

Update an existing webhook subscription. You can change the endpoint URL, filters, included fields, or metafield namespaces without recreating the subscription. 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_webhook_subscription? +

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

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

Can I rate-limit update_webhook_subscription? +

Yes. Add a rate_limit block to the update_webhook_subscription 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_webhook_subscription completely? +

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

update_webhook_subscription 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.

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