Extract and read text from the screen or specific regions using advanced Optical Character Recognition (OCR). Capable of recognizing text in various fonts, sizes, and styles from screenshots, UI elements, dialogs, and any visible text content. Can process entire screen or focus on specific rectan...
AI agents call extract_text 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 performs optical character recognition on visible screen content to extract text. It retrieves information without modifying state, executing code, or causing irreversible changes. This is a pure Read operation with minimal security risk—an agent could extract sensitive information from the screen, but cannot alter it or trigger external actions.
From the tool's definition Tool extracts and reads text from screen using OCR; returns plain text string with no side effects. Description explicitly states 'read text', 'extract', 'recognize text', 'returns plain text string'. No capability to modify, delete, execute, or move money.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access extract_text 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:
{
"version": "1",
"default": "deny",
"tools": {
"extract_text": {}
}
}extract_text 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 and read text from the screen or specific regions using advanced Optical Character Recognition (OCR). Capable of recognizing text in various fonts, sizes, and styles from screenshots, UI elements, dialogs, and any visible text content. Can process entire screen or focus on specific rectangular regions for better accuracy and performance. Essential for reading dynamic content, form values, error messages, or any text that changes programmatically. Returns plain text string of all recognized text. Use with specific regions when possible for faster processing and better accuracy. Commonly paired with screenshot for visual verification. Requires screen recording permission on macOS. 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: 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 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 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. 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 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.