diff --git a/src/pipecat/services/anthropic.py b/src/pipecat/services/anthropic.py
index f0c033375..d8f485296 100644
--- a/src/pipecat/services/anthropic.py
+++ b/src/pipecat/services/anthropic.py
@@ -378,6 +378,26 @@ class AnthropicLLMContext(OpenAILLMContext):
 
     # convert a message in Anthropic format into one or more messages in OpenAI format
     def to_standard_messages(self, obj):
+        """Convert Anthropic message format to standard structured format.
+
+        Handles text content and function calls for both user and assistant messages.
+
+        Args:
+            obj: Message in Anthropic format:
+                {
+                    "role": "user/assistant",
+                    "content": str | [{"type": "text/tool_use/tool_result", ...}]
+                }
+
+        Returns:
+            List of messages in standard format:
+            [
+                {
+                    "role": "user/assistant/tool",
+                    "content": [{"type": "text", "text": str}]
+                }
+            ]
+        """
         # todo: image format (?)
         # tool_use
         role = obj.get("role")
@@ -432,6 +452,30 @@ class AnthropicLLMContext(OpenAILLMContext):
                 return messages
 
     def from_standard_message(self, message):
+        """Convert standard format message to Anthropic format.
+
+        Handles conversion of text content, tool calls, and tool results.
+        Empty text content is converted to "(empty)".
+
+        Args:
+            message: Message in standard format:
+                {
+                    "role": "user/assistant/tool",
+                    "content": str | [{"type": "text", ...}],
+                    "tool_calls": [{"id": str, "function": {"name": str, "arguments": str}}]
+                }
+
+        Returns:
+            Message in Anthropic format:
+            {
+                "role": "user/assistant",
+                "content": str | [
+                    {"type": "text", "text": str} |
+                    {"type": "tool_use", "id": str, "name": str, "input": dict} |
+                    {"type": "tool_result", "tool_use_id": str, "content": str}
+                ]
+            }
+        """
         # todo: image messages (?)
         if message["role"] == "tool":
             return {
diff --git a/src/pipecat/services/google.py b/src/pipecat/services/google.py
index 5442ee91c..383dde624 100644
--- a/src/pipecat/services/google.py
+++ b/src/pipecat/services/google.py
@@ -412,6 +412,25 @@ class GoogleLLMContext(OpenAILLMContext):
         # self.add_message(message)
 
     def from_standard_message(self, message):
+        """Convert standard format message to Google Content object.
+
+        Handles conversion of text, images, and function calls to Google's format.
+        System messages are stored separately and return None.
+
+        Args:
+            message: Message in standard format:
+                {
+                    "role": "user/assistant/system/tool",
+                    "content": str | [{"type": "text/image_url", ...}] | None,
+                    "tool_calls": [{"function": {"name": str, "arguments": str}}]
+                }
+
+        Returns:
+            glm.Content object with:
+                - role: "user" or "model" (converted from "assistant")
+                - parts: List[Part] containing text, inline_data, or function calls
+            Returns None for system messages.
+        """
         role = message["role"]
         content = message.get("content", [])
         if role == "system":
@@ -461,6 +480,27 @@ class GoogleLLMContext(OpenAILLMContext):
         return message
 
     def to_standard_messages(self, obj) -> list:
+        """Convert Google Content object to standard structured format.
+
+        Handles text, images, and function calls from Google's Content/Part objects.
+
+        Args:
+            obj: Google Content object with:
+                - role: "model" (converted to "assistant") or "user"
+                - parts: List[Part] containing text, inline_data, or function calls
+
+        Returns:
+            List of messages in standard format:
+            [
+                {
+                    "role": "user/assistant/tool",
+                    "content": [
+                        {"type": "text", "text": str} |
+                        {"type": "image_url", "image_url": {"url": str}}
+                    ]
+                }
+            ]
+        """
         msg = {"role": obj.role, "content": []}
         if msg["role"] == "model":
             msg["role"] = "assistant"