list_labels

THE RISK

Low Risk

Why list_labels needs a policy

This tool retrieves or enumerates labels, which is a non-destructive query operation. There are no side effects, no code execution, and no data modification. The low severity reflects minimal blast radius—even if an AI agent misuses this tool, it can only retrieve labels that likely already exist in the AFIP system.

From the tool's definition Tool name is 'list_labels' with description 'List labels'. The verb 'list' is a read-only retrieval operation that queries existing data without modifying or executing anything.

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

POLICY

How to control list_labels

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_labels:

policy.json

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

list_labels 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

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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_labels

What does the list_labels tool do? +

List labels. 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_labels? +

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

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

Can I rate-limit list_labels? +

Yes. Add a rate_limit block to the list_labels 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_labels completely? +

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

list_labels 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 →