从图片中提取文字内容（OCR功能）
AI agents call extract_text_from_image to retrieve information from Image Analyzer MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
OCR text extraction is a read-only operation that retrieves visible text content from images without altering the image data or triggering external side effects. This falls squarely within the Read category. Severity is low because misuse would only expose image contents already intended to be readable, with limited blast radius even if an AI agent extracts text from unintended images.
From the tool's definition Tool performs OCR text extraction from images ('从图片中提取文字内容' / 'extract text from image content'). The sibling tools (analyze_image, analyze_image_categories, batch_analyze_images, check_ollama_status, list_supported_formats) and server description emphasize…
Attacks that exploit this kind of access
从图片中提取文字内容（OCR功能）. It is categorised as a Read tool in the Image Analyzer MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Image Analyzer MCP Server MCP server in PolicyLayer and add a rule for extract_text_from_image: 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 Image Analyzer MCP Server. Nothing to install.
extract_text_from_image 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_image 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_image. 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_image is provided by the Image Analyzer MCP Server MCP server (lucoo01/image-analyzer-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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