# create_design_system_from_design_md

Creates a design system for a project, with user uploaded DESIGN.md file, and displays the design system in the UI. Instructions for Tool Call: * Should call upload_design_md tool first to upload DESIGN.md to a Stitch project.

Agent View of the PolicyLayer registry record for `create_design_system_from_design_md`. HTML page: https://policylayer.com/tools/com-googleapis-stitch-mcp/create-design-system-from-design-md

## Facts

- Tool: `create_design_system_from_design_md`
- Server: Mcp (`https://stitch.googleapis.com/mcp`) — https://policylayer.com/tools/com-googleapis-stitch-mcp.md
- Homepage: https://github.com/https://stitch.googleapis.com/mcp
- Risk category: Write (Medium risk)
- Registry record: grade D, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 3 (2 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `projectId` | string | yes | Required. The project ID to update design system for, example: '4044680601076201931', without the `projects/` prefix. |
| `deviceType` | string | no | Optional. The device type of the screen. |
| `selectedScreenInstance` | object | yes | Required. The screen instance to create the design system from, which is created by UploadDesignMd RPC. |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "create_design_system_from_design_md",
    "arguments": {
      "projectId": "<projectId>",
      "selectedScreenInstance": {}
    }
  }
}
```

## Why create_design_system_from_design_md is rated Medium

This tool creates and persists a new design system resource within a Stitch project. It is reversible (design systems can typically be modified or deleted), so it does not qualify as Destructive. It does not execute arbitrary code or external operations (Execute), nor does it move money (Financial).

From the tool's own definition: "The tool description states it 'Creates a design system' which is a create/write operation. The instructions indicate it uploads a file and modifies project state by creating a new design system artifact."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Mcp (14)

- `delete_project` — Destructive — https://policylayer.com/tools/com-googleapis-stitch-mcp/delete-project.md
- `get_project` — Read — https://policylayer.com/tools/com-googleapis-stitch-mcp/get-project.md
- `get_screen` — Read — https://policylayer.com/tools/com-googleapis-stitch-mcp/get-screen.md
- `list_design_systems` — Read — https://policylayer.com/tools/com-googleapis-stitch-mcp/list-design-systems.md
- `list_projects` — Read — https://policylayer.com/tools/com-googleapis-stitch-mcp/list-projects.md
- `list_screens` — Read — https://policylayer.com/tools/com-googleapis-stitch-mcp/list-screens.md
- `apply_design_system` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/apply-design-system.md
- `create_design_system` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/create-design-system.md
- `create_project` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/create-project.md
- `edit_screens` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/edit-screens.md
- `generate_screen_from_text` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/generate-screen-from-text.md
- `generate_variants` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/generate-variants.md
- `update_design_system` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/update-design-system.md
- `upload_design_md` — Write — https://policylayer.com/tools/com-googleapis-stitch-mcp/upload-design-md.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=com-googleapis-stitch-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-googleapis-stitch-mcp