A few considerations.
Is the siding getting hot? That radiant heat and reflected light can scald leaves.
That's a pretty small pot for a large (large plant, not large fruit) indeterminate variety. So it will grown until its roots fail to keep up with demand, then it will get weak.
I see a few small areas of leaf miner damage, but that's nothing to worry about.
Next time you grown an indeterminate variety in a pot, tip it after it sets its first two flower sets. Or plant a patio (type) tomato.
Tipping and training a tomato plant, removing leaf axial branches...all things to consider when you want healthy plants and to maximize ripe tomato production in pots and planters.
Gardening is one of areas of expertise where it is essential to have some resource material at hand. You can still find this book used, its great.
Gardening : The Complete Guide to Growing America's Favorite Fruits and Vegetables
by
National Gardening Association