extract_text_from_image
Extract readable text from image using OCR.
This record as markdown: /tools/7etsuo-image-description-mcp-server/extract-text-from-image.md
What extract_text_from_image does on Image Description MCP Server
AI agents call extract_text_from_image to retrieve information from Image Description MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why extract_text_from_image is rated Low
This tool retrieves and extracts data (text) from images without side effects. It does not create, modify, delete, or execute code. OCR is fundamentally a data extraction operation, fitting the Read category. Severity is low because misuse would at worst return unintended text content, with no blast radius beyond information disclosure of what is already visible in the image.
From the tool's definition Tool performs OCR to 'extract readable text from image' — a read-only retrieval operation with no modification, deletion, or execution of external systems.
Attacks that exploit this kind of access
The rule that runs extract_text_from_image safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Image Description MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For extract_text_from_image, this is the rule to start with:
extract_text_from_image is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Image Description MCP Server, apply this rule, and every extract_text_from_image call is checked against it from then on.
Questions about extract_text_from_image
Extract readable text from image using OCR. It is categorised as a Read tool in the Image Description MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Image Description 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 Description 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 Description MCP Server MCP server (7etsuo/image-description-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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