Capture a screenshot of a specific display. Returns the image.
AI agents call take_screenshot 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 content without modifying, deleting, or executing operations. It is a read-only operation that captures visual information. While screenshots could theoretically expose sensitive information on screen, the tool itself performs no destructive, financial, or code-execution actions.
From the tool's definition Tool name 'take_screenshot' and description 'Capture a screenshot of a specific display. Returns the image' indicate retrieval of visual data with no side effects or modifications to system state.
Attacks that exploit this kind of access
Capture a screenshot of a specific display. Returns the image. 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 take_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 Mcp Desktop. Nothing to install.
take_screenshot 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 take_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.
Set action: deny in the PolicyLayer policy for take_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.
take_screenshot 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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