// The strictest level is deliberately the member with the underlying value 0: when the settings
// file holds a value TolerantEnumConverter cannot read, it falls back to that member. Falling back
// to a more permissive level would open a way out for mail content the user meant to keep in.
/// <summary>
/// Only the services configured in AI Studio.
/// </summary>
ONLY_CONFIGURED_SERVICES=0,
/// <summary>
/// The configured services, and the addresses written in the chat, either by the user or in the result of a tool. No searches with third-party services.