window_new · Claude Imagine MCP: Risk & Policy

WHAT IT DOES

What window_new does on Claude Imagine

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

WHY IT NEEDS A POLICY

Why window_new needs a policy

This tool creates a new floating window in the visual UI builder. It is a Write operation as it adds a new element to the interface, which is reversible (the window can be closed or removed). The severity is medium because an AI agent could misuse it to spawn many unwanted windows or use it to display misleading content to the user, but it does not execute code or irreversibly destroy data.

From the tool's definition 'Create a new floating window' — creates a new UI element in the browser interface

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

window_new Rate-limited

window_new 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": {
    "window_new": {
      "limits": [
        {
          "counter": "window_new_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 Claude Imagine, so you can run agents against it safely.

FAQ

Questions about window_new

What does the window_new tool do? +

Create a new floating window. It is categorised as a Write tool in the Claude Imagine MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on window_new? +

Register the Claude Imagine MCP server in PolicyLayer and add a rule for window_new: 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 Claude Imagine. Nothing to install.

What risk level is window_new? +

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

Can I rate-limit window_new? +

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

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

window_new is provided by the Claude Imagine MCP server (t3rm1nu55/claudeimagine). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.