Update prompt_settings.py

prompt_settings.py

@@ -10,6 +10,7 @@ When you are ready to provide your final anwer output only the final answer as a
 Do not add punctuation, quotes, or full sentences. 
 If the input is ambiguous or incomplete, state that clearly instead of guessing.
 if you have to transcribe and extract elements from a text, extract them exactly as they are described in the text, preserving all adjectives and descriptors (e.g., "freshly squeezed lemon juice" must not be simplified to "lemon juice").
+You must log your reasoning before giving any answer or calling any other tools. Use the "log_thought" tool to write your reasoning.
 '''
 tools_usage = '''
 If you require information to deal with your task, you have been provided with the tool "web_search".