Extract text content from a previously saved screenshot file using advanced OCR (Optical Character Recognition). Perfect for retrieving text from screenshots taken earlier without needing to recapture the screen. Useful for analyzing text content from past screen states, extracting data from imag...
AI agents call extract_text_from_screenshot to retrieve information from macOS Simulator MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and extracts text from existing screenshots using OCR. It has no side effects, cannot modify data, execute code, or alter system state. The confidence is high because the description explicitly limits functionality to extraction and analysis of text from already-captured screen images.
From the tool's definition Tool description states it 'Extract[s] text content from a previously saved screenshot file' and 'Returns extracted text content' - purely retrieval of data from existing artifacts with no modification, deletion, or execution capabilities.
Documented attack patterns abuse exactly the kind of access extract_text_from_screenshot gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and macOS Simulator MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for extract_text_from_screenshot:
{
"version": "1",
"default": "deny",
"tools": {
"extract_text_from_screenshot": {}
}
}extract_text_from_screenshot is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Extract text content from a previously saved screenshot file using advanced OCR (Optical Character Recognition). Perfect for retrieving text from screenshots taken earlier without needing to recapture the screen. Useful for analyzing text content from past screen states, extracting data from images, or processing visual text for further analysis. Use list_recent_screenshots first to find available screenshot files. Returns extracted text content with confidence levels and positioning information. It is categorised as a Read tool in the macOS Simulator MCP Server MCP Server, which means it retrieves data without modifying state.
Register the macOS Simulator MCP Server MCP server in PolicyLayer and add a rule for extract_text_from_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 macOS Simulator MCP Server. Nothing to install.
extract_text_from_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 extract_text_from_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 extract_text_from_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.
extract_text_from_screenshot is provided by the macOS Simulator MCP Server MCP server (ohqay/mac-commander). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from macOS Simulator MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
28 macOS Simulator MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.