List available displays with their numbers. Use the display number with take_screenshot or screenshot_app.
AI agents call list_displays to retrieve information from Mcp Desktop without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves display configuration metadata. It has no side effects, does not modify state, and does not execute code or commands. The purpose is purely informational to support other screenshot tools. This is a straightforward Read category tool with low severity since display enumeration poses minimal security risk.
From the tool's definition Tool name 'list_displays' and description 'List available displays with their numbers' indicate a read-only query operation that retrieves display information without modifying or executing any actions.
Attacks that exploit this kind of access
List available displays with their numbers. Use the display number with take_screenshot or screenshot_app. It is categorised as a Read tool in the Mcp Desktop MCP Server, which means it retrieves data without modifying state.
Register the Mcp Desktop MCP server in PolicyLayer and add a rule for list_displays: 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. Nothing to install.
list_displays is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_displays 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.
Set action: deny in the PolicyLayer policy for list_displays. 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.
list_displays is provided by the Mcp Desktop MCP server (mocha06/mcp-desktop). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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