diff --git a/masakariclient/osc/v1/host.py b/masakariclient/osc/v1/host.py
index cdd2813..4d44734 100644
--- a/masakariclient/osc/v1/host.py
+++ b/masakariclient/osc/v1/host.py
@@ -136,12 +136,16 @@ class CreateHost(command.ShowOne):
         parser.add_argument(
             '--reserved',
             metavar='<reserved>',
-            help=_('Host reservation. True or False.')
+            choices=['True', 'False'],
+            help=_('Host reservation. The supported options are: '
+                   'True, False.')
         )
         parser.add_argument(
             '--on_maintenance',
             metavar='<on_maintenance>',
-            help=_('Maintenance status of host. True or False.')
+            choices=['True', 'False'],
+            help=_('Maintenance status of host. The supported options are: '
+                   'True, False.')
         )
         return parser
 
@@ -184,6 +188,20 @@ class UpdateHost(command.ShowOne):
             metavar='<host>',
             help='Name or ID of the Host',
         )
+        parser.add_argument(
+            '--reserved',
+            metavar='<reserved>',
+            choices=['True', 'False'],
+            help=_('Host reservation. The supported options are: '
+                   'True, False.')
+        )
+        parser.add_argument(
+            '--on_maintenance',
+            metavar='<on_maintenance>',
+            choices=['True', 'False'],
+            help=_('Maintenance status of host. The supported options are: '
+                   'True, False.')
+        )
         parser.add_argument(
             '--name',
             metavar='<name>',
@@ -199,16 +217,6 @@ class UpdateHost(command.ShowOne):
             metavar='<control_attributes>',
             help=_('Attributes about control.')
         )
-        parser.add_argument(
-            '--reserved',
-            metavar='<reserved>',
-            help=_('Host reservation. True or False.')
-        )
-        parser.add_argument(
-            '--on_maintenance',
-            metavar='<on_maintenance>',
-            help=_('Maintenance status of host. True or False.')
-        )
         return parser
 
     def take_action(self, parsed_args):
diff --git a/masakariclient/osc/v1/notification.py b/masakariclient/osc/v1/notification.py
index 3d289e8..32c0e47 100644
--- a/masakariclient/osc/v1/notification.py
+++ b/masakariclient/osc/v1/notification.py
@@ -99,7 +99,9 @@ class CreateNotification(command.ShowOne):
         parser.add_argument(
             'type',
             metavar='<type>',
-            help=_('Type of failure.')
+            choices=['COMPUTE_HOST', 'VM', 'PROCESS'],
+            help=_('Type of failure. The supported options are: '
+                   'COMPUTE_HOST, VM, PROCESS.')
         )
         parser.add_argument(
             'hostname',
diff --git a/masakariclient/osc/v1/segment.py b/masakariclient/osc/v1/segment.py
index eefbd28..81af87a 100644
--- a/masakariclient/osc/v1/segment.py
+++ b/masakariclient/osc/v1/segment.py
@@ -109,7 +109,9 @@ class CreateSegment(command.ShowOne):
         parser.add_argument(
             'recovery_method',
             metavar='<recovery_method>',
-            help=_('Recovery method of segment.')
+            choices=['auto', 'reserved_host'],
+            help=_('Recovery method of segment. The supported options are: '
+                   'auto, reserved_host.')
         )
         parser.add_argument(
             'service_type',
@@ -158,21 +160,23 @@ class UpdateSegment(command.ShowOne):
             metavar='<name>',
             help=_('Name of segment.')
         )
-        parser.add_argument(
-            '--description',
-            metavar='<description>',
-            help=_('Description of segment.')
-        )
         parser.add_argument(
             '--recovery_method',
             metavar='<recovery_method>',
-            help=_('Recovery method of segment.')
+            choices=['auto', 'reserved_host'],
+            help=_('Recovery method of segment. The supported options are: '
+                   'auto, reserved_host')
         )
         parser.add_argument(
             '--service_type',
             metavar='<service_type>',
             help=_('Service type of segment.')
         )
+        parser.add_argument(
+            '--description',
+            metavar='<description>',
+            help=_('Description of segment.')
+        )
         return parser
 
     def take_action(self, parsed_args):
diff --git a/masakariclient/v1/shell.py b/masakariclient/v1/shell.py
index 5fc97d4..64dd8ff 100644
--- a/masakariclient/v1/shell.py
+++ b/masakariclient/v1/shell.py
@@ -48,7 +48,9 @@ def do_notification_show(service, args):
 
 
 @utils.arg('--type', metavar='<TYPE>', required=True,
-           help='Type of failure.')
+           choices=['COMPUTE_HOST', 'VM', 'PROCESS'],
+           help='Type of failure. The supported options are: '
+                'COMPUTE_HOST, VM, PROCESS.')
 @utils.arg('--hostname', metavar='<HOSTNAME>', required=True,
            help='Hostname of notification.')
 @utils.arg('--generated-time', metavar='<GENERATED_TIME>', required=True,
@@ -97,12 +99,14 @@ def do_segment_show(service, args):
 
 @utils.arg('--name', metavar='<SEGMENT_NAME>', required=True,
            help='Name of segment.')
-@utils.arg('--description', metavar='<DESCRIPTION>', required=True,
-           help='Description of segment.')
 @utils.arg('--recovery-method', metavar='<RECOVERY_METHOD>', required=True,
-           help='JSON string about recovery method.')
+           choices=['auto', 'reserved_host'],
+           help='Recovery method. '
+                'The supported options are: auto, reserved_host.')
 @utils.arg('--service-type', metavar='<SERVICE_TYPE>', required=True,
            help='Service type of segment.')
+@utils.arg('--description', metavar='<DESCRIPTION>', required=False,
+           help='Description of segment.')
 def do_segment_create(service, args):
     """Create segment."""
     try:
@@ -122,12 +126,15 @@ def do_segment_create(service, args):
            required=True, help='Name or ID of segment.')
 @utils.arg('--name', metavar='<SEGMENT_NAME>',
            required=False, help='Name of segment.')
-@utils.arg('--description', metavar='<DESCRIPTION>',
-           required=False, help='Description of segment.')
 @utils.arg('--recovery-method', metavar='<RECOVERY_METHOD>',
-           required=False, help='JSON string about recovery method.')
+           choices=['auto', 'reserved_host'],
+           required=False,
+           help='Recovery method. '
+                'The supported options are: auto, reserved_host.')
 @utils.arg('--service-type', metavar='<SERVICE_TYPE>',
            required=False, help='Service type of segment.')
+@utils.arg('--description', metavar='<DESCRIPTION>',
+           required=False, help='Description of segment.')
 def do_segment_update(service, args):
     """Update a segment."""
     try:
@@ -182,18 +189,21 @@ def do_host_show(service, args):
         print(e)
 
 
-@utils.arg('--segment-id', metavar='<SEGMENT_ID>', required=True,
-           help='Name or ID of segment.')
 @utils.arg('--name', metavar='<HOST_NAME>', required=True,
            help='Name of host.')
 @utils.arg('--type', metavar='<TYPE>', required=True,
            help='Type of host.')
 @utils.arg('--control-attributes', metavar='<CONTROL_ATTRIBUTES>',
            required=True, help='Control attributes of host.')
+@utils.arg('--segment-id', metavar='<SEGMENT_ID>', required=True,
+           help='Name or ID of segment.')
 @utils.arg('--reserved', metavar='<RESERVED>', required=False,
-           help='')
+           choices=['True', 'False'],
+           help='Host reservation. The supported options are: True, False.')
 @utils.arg('--on-maintenance', metavar='<ON_MAINTENANCE>', required=False,
-           help='')
+           choices=['True', 'False'],
+           help='Maintenance status of host. The supported options are: '
+                'True, False.')
 def do_host_create(service, args):
     """Create a host."""
     try:
@@ -214,15 +224,19 @@ def do_host_create(service, args):
            help='Name or ID of segment.')
 @utils.arg('--id', metavar='<HOST_ID>', required=True,
            help='Name or ID of host.')
+@utils.arg('--reserved', metavar='<RESERVED>', required=False,
+           choices=['True', 'False'],
+           help='Host reservation. The supported options are: True, False.')
+@utils.arg('--on-maintenance', metavar='<ON_MAINTENANCE>',
+           required=False, choices=['True', 'False'],
+           help='Maintenance status of host. The supported options are: '
+                'True, False.')
 @utils.arg('--name', metavar='<HOST_NAME>', required=False,
            help='Name of host.')
 @utils.arg('--type', metavar='<TYPE>', required=False,
            help='Type of host.')
 @utils.arg('--control-attributes', metavar='<CONTROL_ATTRIBUTES>',
            required=False, help='Control attributes of host.')
-@utils.arg('--reserved', metavar='<RESERVED>', required=False, help='')
-@utils.arg('--on-maintenance', metavar='<ON_MAINTENANCE>',
-           required=False, help='')
 def do_host_update(service, args):
     """Update a host."""
     try: