// MCP TOOL REFERENCE

vault_payment_method

ServerMcp Afip
CategoryFinancial

WHAT IT DOES

What vault_payment_method does on Mcp Afip

AI agents use vault_payment_method to commit financial operations through Mcp Afip — usually the final step of a payment, billing, or trading workflow. A call moves real money.

THE RISK

Critical Risk

Why vault_payment_method needs a policy

This tool stores payment method credentials in a financial vault (Braintree), enabling future charges. Misuse could allow unauthorized storage of payment methods that can be repeatedly charged, making it a Financial-category tool with critical severity due to the potential for ongoing financial exploitation.

From the tool's definition 'Permanently store a tokenized payment method in the Braintree vault' and 'returns a permanent vaulted payment method id that can be reused for future charges'

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

POLICY

How to control vault_payment_method

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 vault_payment_method:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vault_payment_method": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to vault_payment_method is blocked until a human approves it. The rest of the server keeps working.

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EXPLORE

Related tools and policies

More Mcp Afip tools

Financial authorize_transaction Authorize a transaction (reserve funds without capturing) via Braintree GraphQL authorizeP Financial cancel_collection Cancel a scheduled collection request Financial cancel_credit Cancel an authorized-but-uncaptured credit payment. Financial cancel_payment Attempt to cancel a payment that has not yet settled. Iniciador endpoint: POST /payments/{ Financial cancel_payment_intent Cancel a payment intent that has not yet been captured. Fails on already-captured intents; Financial cancel_recurrence Cancel an active recurrence. Future charges will stop; already-charged cycles are untouche Financial cancel_subscription Cancel a subscription by ID Financial revoke_token Revoke an issued access_token or refresh_token at POST /v1/token/revoke. Use to terminate

All 1300 Mcp Afip tools →

Financial tools on other servers

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Go deeper

Critical-risk tools in Mcp Afip → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about vault_payment_method

What does the vault_payment_method tool do? +

Permanently store a tokenized payment method in the Braintree vault via vaultPaymentMethod. The input paymentMethodId must be a single-use nonce; the mutation returns a permanent vaulted payment method id that can be reused for future charges. It is categorised as a Financial tool in the Mcp Afip MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on vault_payment_method? +

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

vault_payment_method is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit vault_payment_method? +

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

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

vault_payment_method 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.

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