diff --git a/lib/bmc_date_and_time_utils.robot b/lib/bmc_date_and_time_utils.robot
index 0140b11..6dde95c 100644
--- a/lib/bmc_date_and_time_utils.robot
+++ b/lib/bmc_date_and_time_utils.robot
@@ -87,6 +87,8 @@
 Set NTP state
     [Documentation]  Set NTP service inactive.
     [Arguments]  ${state}
+    # Description of argument(s):
+    # state      NTP protocol state (True/False).
 
     Redfish.Patch  ${REDFISH_NW_PROTOCOL_URI}  body={'NTP':{'ProtocolEnabled': ${state}}}
     ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
diff --git a/lib/bmc_network_utils.robot b/lib/bmc_network_utils.robot
index 3ecf2f6..8cfb367 100644
--- a/lib/bmc_network_utils.robot
+++ b/lib/bmc_network_utils.robot
@@ -351,7 +351,10 @@
     [Arguments]  ${hostname}  ${status_code}=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
 
     # Description of argument(s):
-    # hostname  A hostname value which is to be configured on BMC.
+    # hostname      A hostname value which is to be configured on BMC.
+    # status_codes  Expected return code from patch operation
+    #               (e.g. "200").  See prolog of rest_request
+    #               method in redfish_plus.py for details.
 
     ${active_channel_config}=  Get Active Channel Config
     ${ethernet_interface}=  Set Variable  ${active_channel_config['${CHANNEL_NUMBER}']['name']}
@@ -426,7 +429,10 @@
     ...  ${valid_status_codes}=${HTTP_OK}
 
     # Description of Argument(s):
-    # static_name_servers:   Address for static name server
+    # static_name_servers    Address for static name server
+    # valid_status_codes     Expected return code from patch operation
+    #                        (e.g. "200").  See prolog of rest_request
+    #                        method in redfish_plus.py for details.
 
     ${cli_nameservers}=  CLI Get Nameservers
     ${cmd_status}=  Run Keyword And Return Status
@@ -594,8 +600,8 @@
     [Arguments]  ${id}  ${interface}=eth0  ${expected_result}=valid
 
     # Description of argument(s):
-    # id  The VLAN ID (e.g. '53').
-    # interface  The physical interface for the VLAN(e.g. 'eth0').
+    # id               The VLAN ID (e.g. '53').
+    # interface        The physical interface for the VLAN(e.g. 'eth0').
     # expected_result  Expected status of VLAN configuration.
 
     @{data_vlan_id}=  Create List  ${interface}  ${id}
@@ -706,8 +712,8 @@
     [Documentation]  Get Valid Channel Number.
     [Arguments]  ${valid_channel_number_interface_names}
 
-    #Description of argument(s):
-    #valid_channel_number_interface_names   Contains channel names in dict.
+    # Description of argument(s):
+    # valid_channel_number_interface_names   Contains channel names in dict.
 
     &{valid_channel_number_interface_name}=  Create Dictionary
 
@@ -776,6 +782,9 @@
     [Documentation]  Get Available channels from channel_config.json file and return as list.
     [Arguments]  ${current_channel}=${0}
 
+    # Description of Arguments
+    # ${current_channel}        Current channel number.
+
     ${valid_channel_number_interface_names}=  Get Channel Number For All Interface
 
     ${valid_channel_number_interface_name}=  Get Valid Channel Number  ${valid_channel_number_interface_names}
@@ -904,6 +913,9 @@
     # Description of the argument(s):
     # static_name_servers  A list of static name server IPs to be
     #                      configured on the BMC.
+    # valid_status_codes  Expected return code from patch operation
+    #                     (e.g. "200").  See prolog of rest_request
+    #                     method in redfish_plus.py for details.
 
     ${active_channel_config}=  Get Active Channel Config
     ${ethernet_interface}=  Set Variable  ${active_channel_config['${CHANNEL_NUMBER}']['name']}
diff --git a/lib/dmtf_tools_utils.robot b/lib/dmtf_tools_utils.robot
index c379bf3..ca8893e 100644
--- a/lib/dmtf_tools_utils.robot
+++ b/lib/dmtf_tools_utils.robot
@@ -18,6 +18,7 @@
     # Description of arguments:
     # rsv_dir_path    Directory path for rsv tool (e.g. "Redfish-Service-Validator").
     # rsv_github_url  Github URL link(e.g "https://github.com/DMTF/Redfish-Service-Validator").
+    # branch_name     Name of the branch.
 
     ${cmd_buf}  Catenate  rm -rf ${rsv_dir_path} ;
     ...  git clone --branch ${branch_name} ${rsv_github_url} ${rsv_dir_path}
@@ -42,6 +43,9 @@
     [Documentation]  Check tool output for errors.
     [Arguments]      ${tool_output}
 
+    # Description of arguments:
+    # tool_output    DMTF tool output.
+
     # Example:
     # Validation has failed: 9 problems found
     # Service could not be started: RetriesExhaustedError()
@@ -53,6 +57,9 @@
     [Documentation]  Check tool output for errors.
     [Arguments]      ${tool_output}
 
+    # Description of arguments:
+    # tool_output    DMTF tool output.
+
     # Example:
     # 0 errors
     Should Contain  ${tool_output}  0 errors
diff --git a/lib/xcat/xcat_utils.robot b/lib/xcat/xcat_utils.robot
index 55131cf..b221290 100644
--- a/lib/xcat/xcat_utils.robot
+++ b/lib/xcat/xcat_utils.robot
@@ -44,9 +44,9 @@
     [Arguments]  ${node_cfg_file_path}=${NODE_CFG_FILE_PATH}
 
     # Get the list of BMC nodes to be added.
-    # This keyword expects file having list of BMC nodes
-    # as an input.
-    # File should have IP addresses of BMC nodes.
+    # node_cfg_file_path    This keyword expects file having list of BMC nodes
+    #                       as an input.
+    #                       File should have IP addresses of BMC nodes.
 
     OperatingSystem.File Should Exist  ${node_cfg_file_path}  msg=cfg file missing.
     File Should Not Be Empty  ${node_cfg_file_path}  msg=Empty config file.
@@ -54,18 +54,22 @@
     ${bmc_list}=  OperatingSystem.Get File  ${node_cfg_file_path}
     RETURN  ${bmc_list}
 
+
 Add Nodes To XCAT
     [Documentation]  Add nodes to XCAT configuration.
     [Arguments]  ${node}  ${username}=${OPENBMC_USERNAME}
     ...          ${password}=${OPENBMC_PASSWORD}
 
     # Description of the argument(s):
-    # node  Name of the node to be added.
+    # node         Name of the node to be added.
+    # username     User name to login.
+    # password     Password to login.
 
     ${cmd_buf}=  Catenate  ${XCAT_DIR_PATH}/mkdef ${node} bmc=${node}
     ...  bmcusername=${username} bmcpassword=${password} mgt=openbmc groups=all
     Execute Command  ${cmd_buf}
 
+
 Validate Added Node
     [Documentation]  Validate added node.
     [Arguments]  ${node}