AI agents call perform_batch_ocr to retrieve information from MCP OCR Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs optical character recognition on batches of images to extract text. This is purely a read operation that retrieves text data from image input without creating, modifying, deleting, or executing external code. No reversible or irreversible modifications occur. While the description is empty, strong contextual evidence from server purpose and sibling tool patterns indicates read-only functionality.
From the tool's definition Tool is part of OCR Server with 'Extracts text from images' as primary function. Sibling tools (get_supported_languages, image_to_data, perform_ocr, perform_pdf_ocr) are all read operations.
Documented attack patterns abuse exactly the kind of access perform_batch_ocr gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP OCR Server, and nothing reaches the server without passing your rules. This is the rule we recommend for perform_batch_ocr:
{
"version": "1",
"default": "deny",
"tools": {
"perform_batch_ocr": {}
}
}perform_batch_ocr is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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perform_batch_ocr. It is categorised as a Read tool in the MCP OCR Server MCP Server, which means it retrieves data without modifying state.
Register the MCP OCR Server MCP server in PolicyLayer and add a rule for perform_batch_ocr: 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 MCP OCR Server. Nothing to install.
perform_batch_ocr 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 perform_batch_ocr 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 perform_batch_ocr. 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.
perform_batch_ocr is provided by the MCP OCR Server MCP server (rjn32s/mcp-ocr). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 MCP OCR Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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5 MCP OCR Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.