delete_pix_key

THE RISK

Critical Risk

Why delete_pix_key needs a policy

This tool irreversibly deletes a PIX key (DICT registration), which is a financial payment identifier in Brazil's instant payment system. Once deleted, the key is permanently removed and becomes available for others to claim, constituting an irreversible action with potential for account takeover, payment fraud, or denial of service to the merchant.

From the tool's definition 'Delete a DICT key' and 'Irreversible — the key becomes available for re-registration' indicate permanent removal of a financial identifier that cannot be undone.

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

POLICY

How to control delete_pix_key

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 delete_pix_key:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_pix_key"
  ]
}

delete_pix_key disappears from the agent's tool list entirely, and any attempt to call it is denied. 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.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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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.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about delete_pix_key

What does the delete_pix_key tool do? +

Delete a DICT key owned by the merchant. Irreversible — the key becomes available for re-registration by any PSP after the BCB lockout window. It is categorised as a Destructive tool in the Mcp Afip MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete_pix_key? +

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

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

Can I rate-limit delete_pix_key? +

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

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

delete_pix_key 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 →