aqua/cli: improve help message

Signed-off-by: Kyr Shatskyy <kyrylo.shatskyy@suse.com>

tools/libaqua/cli.py

@@ -168,14 +168,14 @@ def _get_deployment(ctx: AppCtx, name: str) -> Deployment:
 #
 @app.command("create")
 @click.option("-b", "--box", type=str, required=False,
-              help="Reuse existing box for deployment")
+              help="Deployment box, run 'box list' for all available boxes")
 @click.option("-c", "--connect", type=str, required=False,
               help="Libvirt connect URI, for example 'qemu+ssh://localhost/system'",
               default='qemu:///system')
 @click.option("-i", "--image", type=str, required=False,
-              help="Use image for deployment, use 'image list' to see all available")
+              help="Deployment image, run 'image list' for all available images")
 @click.option("-f", "--force", flag_value=True,
-              help="Override corresponding box if image is used")
+              help="Override corresponding box if needed")
 @click.option("-t", "--deployment-type", type=str, default='vagrant',
               help="Deployment type: vagrant, libvirt")
 @click.option("--num-nodes", required=False, type=int, default=2, show_default=True,
@@ -199,13 +199,19 @@ def cmd_create(
     num_nics: Optional[int]
 ) -> None:
     """
-    Create a new deployment with given <name>.
+    Create a new deployment with given name and required type.
 
-    Checks if the given deployment exist and quit.
+    If deployment with the NAME exists, report about error and quit.
 
-    For vagrant deployments one of the box or image must be provided,
-    if both are requested then quit with error.
+    For vagrant deployments any of --box or --image options could be used.
+    When none of the --box or --image options provided, it will try to
+    find box with default name (aquarium) or the same name as the deployment.
+    If there is no suitable box, then it can be created using image with
+    the default name or same name as the deployment correspondingly.
+    If no image found in turn, fail with error message.
+    Fails with error message if both --box and --image provided.
 
+    For libvirt deployments --connect options is used.
 
     """
     logger.debug(f"create: ctx = {ctx}, name: {name}, box: {box}, img: {image}")