get_listings_item

THE RISK

Low Risk

Why get_listings_item needs a policy

This tool retrieves (GET) a single listing item filtered by SKU—a read-only operation with no side effects. Despite the AFIP/invoicing server context, the function itself performs data retrieval only. Severity is low because exposure of listing information has minimal blast radius; an AI agent could view product SKU details but cannot transact, delete, or execute external operations.

From the tool's definition Tool name 'get_listings_item' and description 'Get a single listing item for the seller by SKU' indicate a retrieval operation that queries listing data without modifying or deleting anything.

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

POLICY

How to control get_listings_item

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_listings_item:

policy.json

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

get_listings_item 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.

CAP THIS TOOL →

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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_listings_item

What does the get_listings_item tool do? +

Get a single listing item for the seller by SKU. 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_listings_item? +

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

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

Can I rate-limit get_listings_item? +

Yes. Add a rate_limit block to the get_listings_item 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_listings_item completely? +

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

get_listings_item 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 →