diff --git a/robot-server/robot_server/service/session/models/command.py b/robot-server/robot_server/service/session/models/command.py
index f209dce4247..028942613a8 100644
--- a/robot-server/robot_server/service/session/models/command.py
+++ b/robot-server/robot_server/service/session/models/command.py
@@ -1,3 +1,21 @@
+"""Modeling of session commands.
+
+Creating a new command type requires these steps:
+1) Creation of a CommandDefinition enum identifying the command
+type.
+
+2) If necessary, define a data payload model.
+
+3) If necessary, define a result payload model.
+
+4) Create specialized `SessionCommandRequest` and `SessionCommandResponse`
+types using the CommandDefinition Literal(s), data, and result payload models.
+If there are no data and result models, then add the CommandDefinition to
+`CommandsEmptyData` type.
+
+5) If not using `CommandsEmptyData` then add specialized request and response
+types to `RequestTypes` and `ResponseTypes`.
+"""
 from datetime import datetime
 from enum import Enum
 import typing
diff --git a/robot-server/robot_server/service/session/models/command_definitions.py b/robot-server/robot_server/service/session/models/command_definitions.py
index 0e82c95ca41..4ad568b06c5 100644
--- a/robot-server/robot_server/service/session/models/command_definitions.py
+++ b/robot-server/robot_server/service/session/models/command_definitions.py
@@ -1,8 +1,14 @@
+"""
+Command type definitions.
+
+Definitions should be grouped into thematic namespaces.
+"""
 import typing
 from enum import Enum
 
 
 class CommandDefinition(str, Enum):
+    """The base of command definition enumerations."""
     def __new__(cls, value):
         """Create a string enum."""
         namespace = cls.namespace()
@@ -17,9 +23,9 @@ def __new__(cls, value):
     @staticmethod
     def namespace():
         """
-        This is primarily for allowing  definitions to define a
-        namespace. The name space will be used to make the value of the
-        enum. It will be "{namespace}.{value}"
+        Override to create a namespoce for the member definitions. The
+         name.space will be used to make the value of the enum. It will
+         be "{namespace}.{value}"
         """
         return None