get_sale_by_order_id

THE RISK

Low Risk

Why get_sale_by_order_id needs a policy

This tool retrieves historical sales/payment data by order identifier. It performs a lookup query with no side effects—it neither modifies data, executes external operations, deletes records, nor moves money. The blast radius of misuse is minimal (information disclosure only). Classified as Read with low severity.

From the tool's definition Tool name 'get_sale_by_order_id' and description 'Look up sale(s)' with 'Returns an array of PaymentIds' indicates data retrieval without modification. The endpoint is GET /sales, a standard read-only query operation.

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

POLICY

How to control get_sale_by_order_id

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 get_sale_by_order_id:

policy.json

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

get_sale_by_order_id 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 get_sale_by_order_id

What does the get_sale_by_order_id tool do? +

Look up sale(s) by MerchantOrderId (GET /sales?merchantOrderId=X — Query API). Returns an array of PaymentIds matching the merchant order. 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 get_sale_by_order_id? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for get_sale_by_order_id: 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 get_sale_by_order_id? +

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

Can I rate-limit get_sale_by_order_id? +

Yes. Add a rate_limit block to the get_sale_by_order_id 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 get_sale_by_order_id completely? +

Set action: deny in the PolicyLayer policy for get_sale_by_order_id. 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 get_sale_by_order_id? +

get_sale_by_order_id 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.

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