If a pilot is on VFR flight following. Would it be ok to let center or whoever the ATC is doing the following know of your intended descent for weather or a descent when in range of the intended airport.
Letting them know your intent is correct...here is my canned answer that I post to this question that pops up every now and then for others that may be following:
Per AIM 4-1-15-b-2:
"When receiving VFR traffic advisory service...Pilots should also inform the controller when changing VFR cruising altitude."
It does not say "must" but "should" and "inform" not "request".
Some controllers may not care or get irritated...their problem. I will always call out an altitude change...when able. There have been situations where I just start down due to busy radio traffic or other reasons...hence "should"
"Nor Cal, Sklyane 12345 starting VFR decent into Watsonville" is all you need.
Now, the one thing that I hear on frequency that irritates controllers all the time is VFR pilots "requesting" an altitude change. You are VFR, you can fly what you want (unless given an altitude restriction)...hence likely a snarky "altitude at your discretion" response.
"Advising" is NOT: "NorCal, would like to start my decent" or "NorCal, can I descend to 5500'?"
Should be "NorCal, Slylane 12345 descending to 5500'"
If your call to ATC requires any response other than "Thank You" from the controller you are not informing, you are requesting...which is not needed and will result in an unnecessary back and forth conversation and possibly a crabby controller.
While AIM is not regulatory, it is the recommended procedure.