Extract structured trade info from a trading chart screenshot using OCR + LLM.
AI agents call extract_trade_from_image to retrieve information from Trading Analysis MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool analyzes an uploaded screenshot and returns extracted trade information via OCR and LLM processing. It reads and parses visual data without creating, modifying, deleting, or executing actions that affect external systems or financial accounts. The output is informational (structured trade data), not a command to execute trades or move funds.
From the tool's definition Tool description states it 'Extract[s] structured trade info from a trading chart screenshot' — a retrieval operation that processes an image to extract data. No modification, deletion, code execution, or financial transaction occurs.
Attacks that exploit this kind of access
Extract structured trade info from a trading chart screenshot using OCR + LLM. It is categorised as a Read tool in the Trading Analysis MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Trading Analysis MCP Server MCP server in PolicyLayer and add a rule for extract_trade_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 Trading Analysis MCP Server. Nothing to install.
extract_trade_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_trade_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_trade_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_trade_from_image is provided by the Trading Analysis MCP Server MCP server (zkyko/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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