create_pix_deposit

THE RISK

Critical Risk

Why create_pix_deposit needs a policy

This tool commits financial obligations by enabling creation of deposit requests in Brazil's Pix payment network. Although it generates a QR code/payload rather than executing the transfer directly, it creates a financial instrument that can move money.

From the tool's definition Tool name 'create_pix_deposit' and description 'Create a Pix instant deposit (BRL). Returns Pix QR code / copy-paste payload' directly indicate movement of money via Pix, Brazil's instant payment system.

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

POLICY

How to control create_pix_deposit

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 create_pix_deposit:

policy.json

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

Any call to create_pix_deposit 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

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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 create_pix_deposit

What does the create_pix_deposit tool do? +

Create a Pix instant deposit (BRL). Returns Pix QR code / copy-paste payload. 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 create_pix_deposit? +

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

create_pix_deposit 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 create_pix_deposit? +

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

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

create_pix_deposit 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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