What about hot day performance?
Note that at SL 30C, zero bleed, the N1 reaches a peak of 114.6%, and this is the hottest TAT at which full rated thrust can be produced. Above this temp, N1 must be rolled back, which of course means less thrust is available. The corresponding aircraft performance is also reduced.
If you're looking at an EPR-rated engine, you'll also see reduced EPR (& thrust) under these conditions.
It's all done to reduce hot section wear & tear; you just can't carry as much load under this circumstance.