list_listings

THE RISK

Low Risk

Why list_listings needs a policy

This tool retrieves seller listings, which is a data query operation with no side effects, state changes, or irreversible actions. It fits the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch).' The severity is low because listing data exposure has minimal blast radius in the context of an AFIP tax/invoicing system.

From the tool's definition Tool name 'list_listings' and description 'List seller' indicate retrieval of listing data without modification. The verb 'list' is a classic Read operation that queries/retrieves data.

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

POLICY

How to control list_listings

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 list_listings:

policy.json

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

list_listings 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

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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 list_listings

What does the list_listings tool do? +

List seller. 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 list_listings? +

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

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

Can I rate-limit list_listings? +

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

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

list_listings 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 →