generate_screen_from_text · Stitch MCP Server MCP

WHAT IT DOES

What generate_screen_from_text does on Stitch MCP Server

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

WHY IT NEEDS A POLICY

Why generate_screen_from_text needs a policy

The tool creates new design assets (screens) in the workspace, which is a reversible write operation. While the generation is AI-driven and the output quality depends on the prompt, the core action is creating and persisting new data in the design project.

From the tool's definition Tool generates or creates a new screen artifact from a text prompt - this is a CREATE operation that modifies the design workspace by adding new content.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_screen_from_text Rate-limited

generate_screen_from_text 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": {
    "generate_screen_from_text": {
      "limits": [
        {
          "counter": "generate_screen_from_text_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Stitch MCP Server, so you can run agents against it safely.

FAQ

Questions about generate_screen_from_text

What does the generate_screen_from_text tool do? +

Generates a new screen from a text prompt describing the desired UI. It is categorised as a Write tool in the Stitch MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_screen_from_text? +

Register the Stitch MCP Server MCP server in PolicyLayer and add a rule for generate_screen_from_text: 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 Stitch MCP Server. Nothing to install.

What risk level is generate_screen_from_text? +

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

Can I rate-limit generate_screen_from_text? +

Yes. Add a rate_limit block to the generate_screen_from_text 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 generate_screen_from_text completely? +

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

generate_screen_from_text is provided by the Stitch MCP Server MCP server (oogleyskr/stitch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.