diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -73,6 +73,8 @@
     entry_points='''
         [console_scripts]
         swh-identify=swh.model.cli:identify
+        [swh.cli.subcommands]
+        identify=swh.model.cli:identify
     ''',
     classifiers=[
         "Programming Language :: Python :: 3",
diff --git a/swh/model/cli.py b/swh/model/cli.py
--- a/swh/model/cli.py
+++ b/swh/model/cli.py
@@ -74,7 +74,7 @@
               help='type of object to identify (default: auto)')
 @click.option('--verify', '-v', metavar='PID', type=PidParamType(),
               help='reference identifier to be compared with computed one')
-@click.argument('objects', nargs=-1,
+@click.argument('objects', nargs=-1, required=True,
                 type=click.Path(exists=True, readable=True,
                                 allow_dash=True, path_type=bytes))
 def identify(obj_type, verify, show_filename, follow_symlinks, objects):