Worse still, there's no standard vocabulary to interact with skills and the flexibility of the wording depends on the developer. You need to mention the app, which can have weird long names (e.g. Agog Reader) or near-duplicate names (e.g. three bitcoin apps).
All-in-all, the skills feature (and the skills store) feels like an after-thought.
Joseph Jaquinta expressed a similar sentiment when he wrote:
"Amazon's traditional areas (everything on AWS) follows a different model. They are more like a utility. Minimal engagement. No direct support. They provide a service. You take it or leave it. While this I think is a workable approach for a wide audience in a mature area, I do not think it is a wise approach for Alexa. But, that's if they give a hoot about 3rd party developers and think they are going to add any significant value to their platform. We don't know if this is so, because they won't say."