Making a veil, magically boosting your jumping ability, and setting fires without any outside tools are all things that are explicitly under the purview of the evocation system.
However, invoking an aspect to add +2 to stealth (and describing it as a veil), or invoking an aspect to add +2 to athletics (and describing it as force added magically), or invoking for effect to start a fire are all also things you can do with aspects. They are not explicitly under the purview of the evocation system, as I have just explained three RAW ways of doing those things.
Casting spells is explicitly under the purview of the evocation system, but invoking aspects has absolutely nothing to do with evocation, and can achieve those effects even using a non-magical aspect (for example invoking "stealthy" to get a +2 to stealth, invoking "athletic" to get a +2 to athletics, or invoking "pyromaniac" to start a fire).
Edit: Heck, if you really want to get technical, by RAW you can't use evocation to boost your jumping ability at all. You can use it to create an aspect that gives you a bonus, but then again you can do that mundanely as well. So I can't see how you could say that that is "explicitly under the purview of the evocation system" in the first place.
Alright, I'll just ask: Why? Why do that instead of just taking Channeling and using the aspect to modify and restrict it? What's the problem with using Channeling (aka, the beginner's magical power) to represent a beginner in magic use that makes this sort of thing preferable?
Because channeling is controlled. Channeling involves will on the part of the user and at least a little understanding of how to control this. A character with Channeling: Fire and a 0 discipline/conviction is still capable of throwing 4 shift fireballs, blocks and maneuvers. A character who only has the aspect "Innate Pyromancer" is capable of occasionally starting a fire. They can't attack, block or maneuver. There's a significant difference there.