format_credit_card

What format_credit_card does on TinyFn

AI agents call format_credit_card to retrieve information from TinyFn without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameters from the server's own tool schema.

Why format_credit_card is rated Low

Formatting a credit card number (adding spaces for readability, e.g., 1234 5678 9012 3456) is a pure data transformation with no destructive, write, execute, or financial implications. It does not move money, execute code, modify state, or delete data. While credit card data is sensitive, the tool itself merely reformats existing numbers without creating obligations or executing transactions.

From the tool's definition Tool name is 'format_credit_card' and description states it 'Format a credit card number with spaces.' This is a formatting/transformation operation that takes input and returns formatted output with no side effects, no data creation, modification, deletion,…

The rule that runs format_credit_card safely

PolicyLayer is an MCP gateway: it sits between your AI agents and TinyFn, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For format_credit_card, this is the rule to start with:

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

Questions about format_credit_card