Capture a screenshot of a specific window (interactive selection)
AI agents call screenshot_window to retrieve information from Screenshot MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads/captures visual data from a specific window on screen. It does not modify, delete, or execute any data — it only retrieves a snapshot. Severity is medium because it can capture sensitive information displayed in any window, including passwords, private messages, or confidential documents, posing a privacy risk if misused.
From the tool's definition Capture a screenshot of a specific window (interactive selection)
Attacks that exploit this kind of access
Capture a screenshot of a specific window (interactive selection). It is categorised as a Read tool in the Screenshot MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Screenshot MCP Server MCP server in PolicyLayer and add a rule for screenshot_window: 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 Screenshot MCP Server. Nothing to install.
screenshot_window 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 screenshot_window 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 screenshot_window. 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.
screenshot_window is provided by the Screenshot MCP Server MCP server (yushinna/screenshot-mcp). 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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