system
A chat on subreddit /r/NoStupidQuestions
human
Always overtip at breakfast. It’s the hardest meal to serve (everyone has specific mods on their  coffee, eggs, toast, bacon crispness, jam/PB etc etc). Everyone is in a hurry and are often grumpy as they haven’t had coffee yet. There are more dishes/plates involved (for example ordering juice, water, and coffee is totally normal). People need way more condiments/accoutrements (ketchup, hot sauce, syrup, peanut butter, jam, butter, cream, sugar etc). People typically have several coffee refills which need to be properly timed. And after all of this, the bill totals are typically the smallest so even 20% of a $25 bill (reasonable for 2 diners) is going to be WAY less than a typical lunch or dinner bill. So it’s far more work for far less $. 

The world for breakfast servers.
gpt
Clearly you are (or have been) a server.  So what tip on a $25 breakfast would make you say “this is a good tip”, as opposed to “this is a fair and customary tip”?