Gosden's charge was making a belated seasonal reappearance, after a setback meant he missed the Greenham Stakes and with it the Qipco 2000 Guineas.
The Newmarket trainer said: "Frankie said he didn't want to get closer to a nice, even pace, the winner used the pacemaker well.
"He (Too Darn Hot) was hard on the bridle and fresh, like I said he would be, he's run his race a little bit early on.
"Frankie was clear in his mind that in the last furlong the lack of a race (told) — but also his stamina was giving out.
"We were here for a trial today to find out if we went for the Derby or the St James's Palace, and we'll run in the St James's Palace.
"I'm delighted with the horse, he might get 10 furlongs later in the year, but not fresh off a lay off — he was vulnerable off a lay off.
"He'd had two weeks walking, he's run a solid race but it was a matter of stamina. If you are going to a Derby, you can't go playing around — I wanted to come for a proper trial and we've had one."