list_transfers

THE RISK

Low Risk

Why list_transfers needs a policy

This tool retrieves or queries transfer data without modifying, creating, or deleting records. The use of 'list' and the presence of optional filters for querying are characteristic of Read operations. In the context of an AFIP tax authority server, listing transfers is a non-destructive information retrieval action with minimal blast radius.

From the tool's definition Tool name is 'list_transfers' and description states 'List transfers with optional filters' — a retrieval/query operation with no side effects.

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

POLICY

How to control list_transfers

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_transfers:

policy.json

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

list_transfers 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 list_transfers

What does the list_transfers tool do? +

List transfers with optional filters. 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_transfers? +

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

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

Can I rate-limit list_transfers? +

Yes. Add a rate_limit block to the list_transfers 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_transfers completely? +

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

list_transfers 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 →