get_card_token

THE RISK

Low Risk

Why get_card_token needs a policy

This tool retrieves card token data in masked form (PII is redacted). While it accesses sensitive payment card information, the masked return values and read-only nature (GET endpoint) classify it as Read rather than higher severity. The low severity reflects that masked data carries reduced risk compared to full card details, though access controls should still be strict in production.

From the tool's definition Tool name and description both indicate retrieval: 'Retrieve the stored card data' and 'Returns masked card fields'. The action is a GET operation that queries existing data without modification or deletion.

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

POLICY

How to control get_card_token

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_card_token:

policy.json

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

get_card_token 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

More Mcp Afip tools

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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_card_token

What does the get_card_token tool do? +

Retrieve the stored card data associated with a Cartão Protegido token (GET /card/{token}). Returns masked card fields + brand + expiration. 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_card_token? +

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

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

Can I rate-limit get_card_token? +

Yes. Add a rate_limit block to the get_card_token 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_card_token completely? +

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

get_card_token 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 →