# update_site_custom_code

Update custom code (CSS/JS) for the entire site. Only sends fields you specify — others remain unchanged. IMPORTANT: Before calling, you MUST read existing code with get_site_custom_code first, then show the user what will change and get explicit confirmation. NEVER update without user approval. - code_before_head: HTML/script inserted before </head> - code_before_body: HTML/script inserted before </body> - code_custom_css: Custom CSS (auto-wrapped in <style>) - code_custom_javascript: Custom JavaScript

Agent View of the PolicyLayer registry record for `update_site_custom_code`. HTML page: https://policylayer.com/tools/webcake-storefront/update-site-custom-code

## Facts

- Tool: `update_site_custom_code`
- Server: Webcake Storefront (`webcake-storefront-mcp`) — https://policylayer.com/tools/webcake-storefront.md
- Install: `npx -y webcake-storefront-mcp`
- Homepage: git+https://github.com/vuluu2k/webcake-storefront-mcp.git
- 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_site_custom_code",
    "arguments": {}
  }
}
```

## Why update_site_custom_code is rated Medium

This is a Write operation because it creates or modifies site data (custom code) reversibly. While the tool modifies code that could affect site behavior, the changes themselves are not destructive—they can be undone by updating back to previous values. However, severity is 'high' rather than 'medium' because malicious custom code (XSS, credential theft, malware) injected site-wide could compromise all users.

From the tool's own definition: "Tool updates custom code fields (CSS/JS/HTML) for entire site including 'code_before_head', 'code_before_body', 'code_custom_css', and 'code_custom_javascript'."

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

AI agents use update_site_custom_code to create or update resources in Webcake Storefront, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Webcake Storefront environment.

## Recommended policy (PolicyLayer)

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

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

## Other tools on Webcake Storefront (286)

- `clear_page_draft` — Destructive — https://policylayer.com/tools/webcake-storefront/clear-page-draft.md
- `delete_affiliate_accounts` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-affiliate-accounts.md
- `delete_affiliate_products` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-affiliate-products.md
- `delete_appointment_addresses` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-appointment-addresses.md
- `delete_appointment_calendars` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-appointment-calendars.md
- `delete_appointment_classifies` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-appointment-classifies.md
- `delete_appointment_employees` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-appointment-employees.md
- `delete_article` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-article.md
- `delete_automation` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-automation.md
- `delete_collection` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-collection.md
- `delete_contacts` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-contacts.md
- `delete_course` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-course.md
- `delete_courses` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-courses.md
- `delete_domain` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-domain.md
- `delete_employees` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-employees.md
- `delete_global_section` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-global-section.md
- `delete_global_source` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-global-source.md
- `delete_page` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-page.md
- `delete_partner_feeds` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-partner-feeds.md
- `delete_product` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-product.md
- `delete_product_category` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-product-category.md
- `delete_redirect_urls` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-redirect-urls.md
- `delete_saved_filter` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-saved-filter.md
- `delete_site_utms` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-site-utms.md
- `delete_subscribers` — Destructive — https://policylayer.com/tools/webcake-storefront/delete-subscribers.md
- `empty_media_trash` — Destructive — https://policylayer.com/tools/webcake-storefront/empty-media-trash.md
- `remove_font` — Destructive — https://policylayer.com/tools/webcake-storefront/remove-font.md
- `remove_font_group` — Destructive — https://policylayer.com/tools/webcake-storefront/remove-font-group.md
- `remove_reviews` — Destructive — https://policylayer.com/tools/webcake-storefront/remove-reviews.md
- `unblock_all_phone_customers` — Destructive — https://policylayer.com/tools/webcake-storefront/unblock-all-phone-customers.md
- …and 256 more: https://policylayer.com/tools/webcake-storefront.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`

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