Through the agency of
Definition 1 of 1
Pro Tip 1/3Intermediary Involved
Indicates something or someone is used as a go-between to accomplish a task. 
Negotiations were successful through the agency of an experienced diplomat.
Pro Tip 2/3Not Direct
Highlights that the action does not happen directly, but through an intermediate source or tool. 
Messages were conveyed through the agency of encrypted emails.
Pro Tip 3/3Impersonal Tone
The phrase can make a sentence sound formal or technical, which could create an impersonal tone. 
Infection spreads through the agency of waterborne bacteria.