// MCP TOOL REFERENCE

pay_tribute

Pay a federal tribute (DARF, GPS, GRU) or other guia de arrecadação via Caixa. Input is the full 44/47-digit barcode or linha digitável plus debit account. Requires arrecadação contract.

ServerMcp Afip
CategoryFinancial

How to control pay_tribute ↓

WHAT IT DOES

What pay_tribute does on Mcp Afip

AI agents use pay_tribute 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 pay_tribute needs a policy

This tool directly moves money from a user's account to satisfy tax obligations. It commits financial obligations and transfers funds irreversibly. The requirement for a 'debit account' and 'arrecadação contract' confirms this is a payment execution capability. Any misuse (wrong amount, wrong account, repeated submissions) would result in unauthorized financial transfers. This is the most severe risk category.

From the tool's definition Tool description explicitly states 'Pay a federal tribute (DARF, GPS, GRU)' and 'debit account', indicating movement of money. DARF, GPS, and GRU are Brazilian/Argentine tax payment instruments that transfer funds.

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

POLICY

How to control pay_tribute

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 pay_tribute:

policy.json

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

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

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

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 →

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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 pay_tribute

What does the pay_tribute tool do? +

Pay a federal tribute (DARF, GPS, GRU) or other guia de arrecadação via Caixa. Input is the full 44/47-digit barcode or linha digitável plus debit account. Requires arrecadação contract. 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 pay_tribute? +

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

pay_tribute 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 pay_tribute? +

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

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

pay_tribute 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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1300 Mcp Afip tools catalogued and risk-classified — across an index of 43,000+ MCP servers.