# update_page_source

Directly update the full page source JSON. IMPORTANT: Before calling this tool, you MUST: 1. Read existing source with get_page_source first 2. Show the user what will change and get explicit confirmation 3. NEVER call without user approval — this replaces the ENTIRE page source Safeguarded: blocks if new source is <50% of existing size.

Agent View of the PolicyLayer registry record for `update_page_source`. HTML page: https://policylayer.com/tools/webcake-storefront/update-page-source

## Facts

- Tool: `update_page_source`
- 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_page_source",
    "arguments": {}
  }
}
```

## Why update_page_source is rated Medium

This tool creates or modifies page data reversibly. While it operates at a full-page level (high blast radius), it does not permanently delete data or execute arbitrary code. It is Write rather than Execute because it updates structured data (JSON) rather than running computations or commands.

From the tool's own definition: "The tool description explicitly states it 'Directly update the full page source JSON' and 'replaces the ENTIRE page source.' It modifies page content reversibly (as opposed to deletion), making it a Write operation."

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

AI agents use update_page_source 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_page_source": {
      "limits": [
        {
          "counter": "update_page_source_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`

---

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