What are these white eggs I found on my tomato plant?
It’s crazy that the OP took this picture without noticing the caterpillar right there!
Exactly! That’s what I’m saying! Hahaha!
I laughed out loud and showed my spouse, but they didn’t find it as funny as I did, lol. It’s really impressive camouflage!
I’m laughing with you!
These things are so hard to spot, even when you’re actively looking for them. They drive me absolutely bonkers!
Those are wasp eggs inside a hornworm.
Actually, those are cocoons, not eggs! The eggs were laid inside the caterpillar. The wasps carefully consumed the caterpillar from the inside out, making sure not to kill it until they had all emerged safely. The caterpillar eventually dies because it doesn’t complete its metamorphosis.
The wasp larvae grow to maturity, push to the edge of the caterpillar, and spin cocoons on the outside. From these cocoons, adult wasps will emerge, mate, and continue the cycle of life.
For more details, you can check out this article: Braconid Wasps.
Also, notice the holes at the ends? That’s where the wasps have emerged. You can go ahead and throw this guy in the garbage. He’ll keep eating, but he won’t be able to mature into an adult.
The caterpillar definitely dies because the wasp larvae consume its internal organs and then burrow out.
Does it look dead at the moment?
Yes, but not until the wasps are long gone
Ok, can I subscribe to your insect facts pls?
The wasps haven’t hatched yet. But horneorms can eat tomatoes plants quickly
Also, see the holes on the ends?
The holes are visible in the ones on top facing the camera, but it’s not easy to see at this resolution, for sure.
I honestly can’t see any holes on the ends, and it’s driving me a bit crazy 
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They most definitely kill the hornworm. Even your source says so.