An engineers view
I'm a type rated engineer on 206 & 212.
In the past I spent 3 years in a lab doing nothing else but analyzing debris on chip plugs, filters & SOAP (oil) samples. (very boring).
Engines & gearboxes have hundreds of metal parts rotating at high speed, under enormous pressure, high temperatures & the only thing separating these parts is a microscopic layer of oil.
Under these conditions you can be sure that the metal parts will wear & produce metal debris.
Some designs of engines/gearboxes produce very little debris (jet Ranger falls into this category). Others like the G/boxes on S58/Wessex continuously produce wear debris.
If on your B3 you are going many flight hours between chip lights on the same componant, say (25 hrs +) and when you inspect the chip plug you only find a small quantity of very fine debris or the occaisional small "hair" then you dont have a problem.
If you regularly get a chip light on the same componant or when you inspect the plug there are several pieces of coarse debris.
Or you get more debris on the chip plug during the post maintenance ground run, then you have probably got a problem.
There are clear guidelines for this in the Maintenance Manual.
Sounds like you & your engineer did it by the book, no worries.
Sounds like the officials who released you from the contract were looking for an excuse to save money, or they know nothing about helicopter maintenance, probably both.