list_identities

THE RISK

Low Risk

Why list_identities needs a policy

The tool retrieves personal/business identity information (legal name, document, address) without modifying or deleting data. While the severity is medium rather than low due to the sensitive nature of identity data (could expose PII or business information if misused by an AI agent), the action itself is read-only. The GET endpoint and 'Fetch' verb confirm no side effects.

From the tool's definition Tool name 'list_identities' and description 'Fetch identity data (legal name, document, address)' with GET endpoint indicates data retrieval with no modification or deletion capability.

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

POLICY

How to control list_identities

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_identities:

policy.json

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

list_identities 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 list_identities

What does the list_identities tool do? +

Fetch identity data (legal name, document, address) for an item. Pluggy endpoint: GET /identity?itemId=. 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_identities? +

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

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

Can I rate-limit list_identities? +

Yes. Add a rate_limit block to the list_identities 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_identities completely? +

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

list_identities 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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