More or less what everybody else said.
Beyond that: by extension, the service for which a breaker is to be employed will dictate its specifications, in other words don't get to thinking that a breaker is a breaker is a breaker. By way of example, our utility routinely switches 230 kV capacitors with ratings > 400 MX in and out of service with independent pole operation SF6 breakers, but in most cases the normal IPO breaker has a second in series with it just in case the first breaker becomes inoperable. Where a second breaker has not been provided due to cost and/or lesser system impact, inoperability of the first breaker keys some "fancy footwork" [ read: idiosyncratic switching ] to remove said capacitor from service, often involving short-term load shedding, just to preclude equipment damage. And yes, due to the severe operating duty major damage will definitely occur if, for example, one attempts to remove such a capacitor from service with an oil circuit breaker; it has happened, and it isn't pretty.
Similarly, a yard or bus tie breaker may be called upon to interrupt greater fault currents than a dedicated line circuit breaker; indeed, as our utility's grid has grown and fault current infeed capability has risen in certain locations, it has become necessary to run with certain previously-closed yard tie breakers normally open.
Hope this helps.
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]