Take a screenshot of the selected (or windowTitle-matched) Electron page. Returns base64 image. Optionally save to outputPath (validated for security). Same API as reference halilural/electron-mcp-server.
AI agents call take_screenshot to retrieve information from Electron without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Taking a screenshot is a passive information-gathering operation that reads the current visual state of an Electron window without modifying, deleting, or executing any code on the target system. While the server enables app automation, this particular tool only captures and returns image data.
From the tool's definition Tool 'take_screenshot' retrieves visual content from an Electron app via Chrome DevTools Protocol. Description states it 'Take[s] a screenshot' and 'Returns base64 image' with no modification or execution of the underlying application state.
Attacks that exploit this kind of access
Take a screenshot of the selected (or windowTitle-matched) Electron page. Returns base64 image. Optionally save to outputPath (validated for security). Same API as reference halilural/electron-mcp-server. It is categorised as a Read tool in the Electron MCP Server, which means it retrieves data without modifying state.
Register the Electron 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 Electron. 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 Electron MCP server (ohah/electron-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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