Take a screenshot of the current desktop. Returns the screenshot as a PNG image.
AI agents call computer_screenshot to retrieve information from Computer Use MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Screenshots are purely observational—they retrieve visual data from the desktop with no side effects, no state changes, and no capability to modify or delete data. This clearly fits the Read category (retrieves or queries data; no side effects). Severity is low because screenshot access alone does not enable harmful operations, though it could support reconnaissance if combined with other tools.
From the tool's definition Tool description states: 'Take a screenshot of the current desktop. Returns the screenshot as a PNG image.' This is a read-only operation that captures and returns visual information without modifying, deleting, or executing any actions on the system.
Attacks that exploit this kind of access
Take a screenshot of the current desktop. Returns the screenshot as a PNG image. It is categorised as a Read tool in the Computer Use MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Computer Use MCP Server MCP server in PolicyLayer and add a rule for computer_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 Computer Use MCP Server. Nothing to install.
computer_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 computer_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 computer_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.
computer_screenshot is provided by the Computer Use MCP Server MCP server (sebastianbaltes/claude_code_computer_use_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
computer_screenshot is one line of Computer Use MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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