diff --git a/tensorbay/cli/__init__.py b/tensorbay/cli/__init__.py
index 65c3a9d3e..93e9ebb2a 100644
--- a/tensorbay/cli/__init__.py
+++ b/tensorbay/cli/__init__.py
@@ -3,4 +3,4 @@
 # Copyright 2021 Graviti. Licensed under MIT License.
 #
 
-"""Graviti TensorBay CLI."""
+"""TensorBay CLI."""
diff --git a/tensorbay/cli/cli.py b/tensorbay/cli/cli.py
index 4233f23c7..f974237b3 100644
--- a/tensorbay/cli/cli.py
+++ b/tensorbay/cli/cli.py
@@ -4,33 +4,7 @@
 #
 # pylint: disable=import-outside-toplevel
 
-"""Command-line interface.
-
-Use ``gas <command>`` in terminal to operate on datasets.
-
-Use ``gas auth`` to authenticate the accessKey of gas.
-
-Use ``gas branch`` to list, create or delete branches.
-
-Use ``gas commit`` to commit drafts.
-
-Use ``gas config`` to configure the options when using gas CLI.
-
-Use ``gas cp`` to copy local data to a remote path.
-
-Use ``gas dataset`` to list, create or delete datasets.
-
-Use ``gas draft`` to list or create drafts.
-
-Use ``gas log`` to show commit logs.
-
-Use ``gas ls`` to list data under the path.
-
-Use ``gas rm`` to remove the remote data.
-
-Use ``gas tag`` to list, create or delete tags.
-
-"""
+"""Definitions of TensorBay Command-line Interface commands."""
 
 from functools import partial
 from typing import Iterable, Optional, Tuple
diff --git a/tensorbay/cli/custom.py b/tensorbay/cli/custom.py
index fd2a7bd83..2291efcf9 100644
--- a/tensorbay/cli/custom.py
+++ b/tensorbay/cli/custom.py
@@ -4,7 +4,7 @@
 #
 # pylint: disable=import-outside-toplevel
 
-"""Subclass declaration and definition of click class."""
+"""Customization of the click classes for TensorBay CLI."""
 
 from types import MethodType
 from typing import Any, Optional, Sequence, Tuple, Union
diff --git a/tensorbay/cli/tbrn.py b/tensorbay/cli/tbrn.py
index 8a488e117..12ab263dc 100644
--- a/tensorbay/cli/tbrn.py
+++ b/tensorbay/cli/tbrn.py
@@ -3,14 +3,7 @@
 # Copyright 2021 Graviti. Licensed under MIT License.
 #
 
-"""TensorBay Resource Name (TBRN) related classes.
-
-:class:`TBRNType` is an enumeration type, which has 7 types: 'DATASET', 'SEGMENT', 'FRAME',
-'SEGMENT_SENSOR', 'FRAME_SENSOR', 'NORMAL_FILE' and 'FUSION_FILE'.
-
-:class:`TBRN` is a TensorBay Resource Name(TBRN) parser and generator.
-
-"""
+"""Definitions of TensorBay Resource Name (TBRN) related classes."""
 
 from enum import Enum, Flag, auto
 from typing import Any, List, Optional, Tuple, TypeVar
diff --git a/tensorbay/cli/utility.py b/tensorbay/cli/utility.py
index e78686b83..988cf2ab6 100644
--- a/tensorbay/cli/utility.py
+++ b/tensorbay/cli/utility.py
@@ -3,7 +3,7 @@
 # Copyright 2021 Graviti. Licensed under MIT License.
 #
 
-"""Graviti Tensorbay gas CLI utility functions."""
+"""TensorBay gas CLI utility functions."""
 
 import logging
 import os