desktop_screenshot · Universal Dev MCP: Risk & Policy

WHAT IT DOES

What desktop_screenshot does on Universal Dev MCP

AI agents call desktop_screenshot to retrieve information from Universal Dev MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why desktop_screenshot needs a policy

This tool retrieves information (a screenshot/image of the desktop) without modifying any state, executing code, or causing destructive actions. It is a read-only operation.

From the tool's definition Tool name: 'desktop_screenshot'; description: 'Desktop ka screenshot lo (GNOME Wayland/XWayland)'. The tool captures a visual snapshot of the desktop/screen, retrieving visual data with no modification or side effects.

Attacks that exploit this kind of access

Questions about desktop_screenshot

What does the desktop_screenshot tool do? +

Desktop ka screenshot lo (GNOME Wayland/XWayland). It is categorised as a Read tool in the Universal Dev MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on desktop_screenshot? +

Register the Universal Dev MCP server in PolicyLayer and add a rule for desktop_screenshot: 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 Universal Dev MCP. Nothing to install.

What risk level is desktop_screenshot? +

desktop_screenshot is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit desktop_screenshot? +

Yes. Add a rate_limit block to the desktop_screenshot 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_screenshot completely? +

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

desktop_screenshot is provided by the Universal Dev MCP server (kallusuvaidyam/universal_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.