The Investigator background grants the player a magnifying glass in their starting equipment. The item's details mention starting a fire in broad daylight, and have the following added:
A magnifying glass grants advantage on any ability check made to appraise or inspect an item that is small or highly detailed.
What I was wondering is, if you could add this benefit to spells like the Identify spell, Find Traps, Detect Poison, skill checks like insight or investigation, or rolls to discern an illusion?
Furthermore, if one had expertise in investigation, would the magnifying glass add any benefits?