These are the keywords that tell the CLI what action to take. The listed actions correspond to everything you can do via the screens on the app when you point, click, and type text into fields.
You see a pattern to the beginning or prefix that is an action verb such as: add, copy, export, get, modify, move, remove, run, store, update, and more depending on the app.
The ending or suffix to the action name is the noun or object of the verb such as attachment, comment, label, permission, user, and more depending on the app.
For example, the action addComment adds a comment to an item in the app.
Each app has its own features and set of actions, in addition to the actions shared with other apps.
To get all help for an action add --help to the action. Example: --action runFromList --help