About 18 months ago I had some plumbing work done and a ton of sediment was loosened in my pipes. Clogged the bathroom sink faucet fully and it had to be removed and cleaned out.
Since then, the American Standard 4019 toilet also hasn't worked well. Initially, the bowl wouldn't fill well, that has gotten better over time. However, it generally requires holding the handle and pouring about 16 ounces of extra water poured down the bowl to get a successful flush.
I've tried cleaning the jets with an allen wrench, no sediment was detectable there. I poured some food coloring/water into the overflow valve and it only came out of the bottom of the toilet, none seeped from the jets, though during a flush, water does come from them.
I've tried using a cheap manual auger, it didn't have any impact on the problem.