When it's less important, I just tell everyone what they see, but in order from worst perception check to best.

Then I give player with the best check a chance to give voice to how their character alerts the party.

If they choose not to, then I ask the players to honor that the other PCs don't know what's up.

At least one shambling horror creature has gotten a free pass this way when only the Warlock noticed it.

Warlock: "I say nothing."

GM: "It waits, then seems to give you a knowing look before wandering away into the woods."