zernio_list_custom_fields

What zernio_list_custom_fields does on Zernio

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

Why zernio_list_custom_fields is rated Low

This tool queries and retrieves metadata about custom contact fields within the Zernio account. It performs a read-only operation that returns information without altering any data, executing external operations, or creating financial obligations. The low severity reflects minimal blast radius if misused by an agent — it only exposes the schema/structure of custom fields, not sensitive contact data itself.

From the tool's definition Tool name contains 'list' and description states 'List all custom contact fields' — a retrieval operation with no modification, deletion, or side effects.

The rule that runs zernio_list_custom_fields safely

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

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

Questions about zernio_list_custom_fields