documents_ocr

THE RISK

Low Risk

Why documents_ocr needs a policy

This tool performs optical character recognition on documents and returns structured extracted data. It is a query/retrieval operation with no side effects—it does not create, modify, delete, execute commands, or move money. The POST HTTP method is used for input submission, but the semantic function is read-only data extraction.

From the tool's definition Tool name 'documents_ocr' and description 'OCR a Brazilian ID document... Returns extracted structured fields' indicate data extraction and reading.

Documented attack patterns abuse exactly the kind of access documents_ocr gives an agent:

POLICY

How to control documents_ocr

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Afip, and nothing reaches the server without passing your rules. This is the rule we recommend for documents_ocr:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "documents_ocr": {}
  }
}

documents_ocr is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Mcp Afip — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about documents_ocr

What does the documents_ocr tool do? +

OCR a Brazilian ID document (RG / CNH / CRLV / proof of residence / passport). Returns extracted structured fields per document type. POST /v1/documents/ocr. It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on documents_ocr? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for documents_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 Afip. Nothing to install.

What risk level is documents_ocr? +

documents_ocr is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit documents_ocr? +

Yes. Add a rate_limit block to the documents_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.

How do I block documents_ocr completely? +

Set action: deny in the PolicyLayer policy for documents_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.

What MCP server provides documents_ocr? +

documents_ocr is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Afip tool call.

Start from Mcp Afip, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →