diff --git a/ttf/talk.py b/ttf/talk.py
index 7131534..a783d5a 100644
--- a/ttf/talk.py
+++ b/ttf/talk.py
@@ -5,6 +5,15 @@
 
 
 def chat_with_pdf(path: str, prompt:str) -> str:
+    """_summary_
+
+    Args:
+        path (str): _description_
+        prompt (str): _description_
+
+    Returns:
+        str: _description_
+    """
 
     reader = PdfReader(path)
     text = "\n".join([page.extract_text() for page in reader.pages])
@@ -18,6 +27,12 @@ def chat_with_pdf(path: str, prompt:str) -> str:
 @click.option("--pdf", "-p", type=click.Path(exists=True), required=True)
 @click.option("--prompt", "-pr", type=str, default="Summarize the following text")
 def main(pdf, prompt):
+    """_summary_
+
+    Args:
+        pdf (_type_): _description_
+        prompt (_type_): _description_
+    """
     chat_with_pdf(pdf, prompt)
 
 if __name__ == "__main__":
diff --git a/ttf/utils.py b/ttf/utils.py
index 2c015df..9d162c0 100644
--- a/ttf/utils.py
+++ b/ttf/utils.py
@@ -8,8 +8,18 @@
 
 
 # Function to send a message to the OpenAI chatbot model and return its response
-def send_message(message_log):
+def send_message(message_log: list) -> str:
+    """_summary_
 
+    Args:
+        message_log (list): _description_
+
+    Raises:
+        ValueError: _description_
+
+    Returns:
+        str: _description_
+    """
     try:
         api_key = os.environ["ANTHROPIC_API_KEY"]
     except KeyError:
@@ -27,7 +37,12 @@ def send_message(message_log):
 
 
 
-def chat_with(user_input:str):
+def chat_with(user_input:str)-> None:
+    """_summary_
+
+    Args:
+        user_input (str): _description_
+    """
     # Initialize the conversation history with a message from the chatbot
     # message_log = [{"role": "system", "content": "You are a helpful assistant."}]
     message_log = []
@@ -82,6 +97,16 @@ def chat_with(user_input:str):
 
 
 def summarize_pdf_old(client: anthropic.Client, path: str, prompt:str) -> str:
+    """_summary_
+
+    Args:
+        client (anthropic.Client): _description_
+        path (str): _description_
+        prompt (str): _description_
+
+    Returns:
+        str: _description_
+    """
     reader = PdfReader(path)
     text = "\n".join([page.extract_text() for page in reader.pages])