desktop_clipboard_write · MCP Desktop Tools MCP

WHAT IT DOES

What desktop_clipboard_write does on MCP Desktop Tools

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

WHY IT NEEDS A POLICY

Why desktop_clipboard_write needs a policy

This tool creates or modifies clipboard data reversibly. While clipboard writes are generally low-impact, they can facilitate prompt injection attacks, credential theft preparation, or manipulation of data that the user later pastes into sensitive applications.

From the tool's definition Tool name 'desktop_clipboard_write' and description 'Write text to the clipboard' explicitly indicate modification of system clipboard data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

desktop_clipboard_write Rate-limited

desktop_clipboard_write 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": {
    "desktop_clipboard_write": {
      "limits": [
        {
          "counter": "desktop_clipboard_write_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 MCP Desktop Tools, so you can run agents against it safely.

FAQ

Questions about desktop_clipboard_write

What does the desktop_clipboard_write tool do? +

Write text to the clipboard. It is categorised as a Write tool in the MCP Desktop Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on desktop_clipboard_write? +

Register the MCP Desktop Tools MCP server in PolicyLayer and add a rule for desktop_clipboard_write: 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 MCP Desktop Tools. Nothing to install.

What risk level is desktop_clipboard_write? +

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

Can I rate-limit desktop_clipboard_write? +

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

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

desktop_clipboard_write is provided by the MCP Desktop Tools MCP server (k1ta141k/mcp-desktop-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.