Everything has to be very sanitary. I prefer the less tools the better for sanitation reasons. Limit the possibilities of infection.
I wont trust a plastic spoon in the brew or a paint stirrer unless they were polished stainless steel, thoroughly cleaned and sanitized but I'm fussier than ever and just throwing thought. Hopefully provocative. All wort sealed inside the sanitized fermenter, 1/3rd head space you can shake it to hell, little bit of exercise, with less worries of contamination.