get_credit_card_bills

THE RISK

Low Risk

Why get_credit_card_bills needs a policy

This tool retrieves credit card billing information, which is a read-only operation with no side effects. However, severity is elevated to 'high' due to the sensitive financial nature of credit card bills—an AI agent with access to this could expose personally identifiable financial data, payment history, or account details. The Open Finance protocol integration suggests access to regulated financial data.

From the tool's definition Tool name 'get_credit_card_bills' and description 'Get credit card bills (faturas) via Open Finance' indicate retrieval of financial statement data without modification.

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

POLICY

How to control get_credit_card_bills

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for get_credit_card_bills:

policy.json

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

get_credit_card_bills 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 Ap2 — 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

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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_credit_card_bills

What does the get_credit_card_bills tool do? +

Get credit card bills (faturas) via Open Finance. It is categorised as a Read tool in the Mcp Ap2 MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_credit_card_bills? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for get_credit_card_bills: 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 Ap2. Nothing to install.

What risk level is get_credit_card_bills? +

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

Can I rate-limit get_credit_card_bills? +

Yes. Add a rate_limit block to the get_credit_card_bills 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_credit_card_bills completely? +

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

get_credit_card_bills is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Ap2 tool call.

Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →