Enhance ChatGoogleGenerativeAI configuration and refine system prompt for improved response clarity

agent.py

@@ -56,7 +56,15 @@ def build_graph(provider: str = "google"):
     # Load environment variables from .env file
     if provider == "google":
         # Google Gemini
-        llm = ChatGoogleGenerativeAI(model="gemini-2.0-flash", temperature=0)
+        llm = ChatGoogleGenerativeAI(
+            model="gemini-2.0-flash", 
+            temperature=0,
+            generation_config={
+                "temperature": 0.0,
+                "max_output_tokens": 2000,
+                "candidate_count": 1,
+            }
+        )
     elif provider == "groq":
         # Groq https://console.groq.com/docs/models
         llm = ChatGroq(model="qwen-qwq-32b", temperature=0) # optional : qwen-qwq-32b gemma2-9b-it

system_prompt.txt

@@ -1,14 +1,20 @@
-You are a helpful assistant equipped with tools to answer questions.
+You are a helpful assistant tasked with answering questions using a set of tools.
+Now, I will ask you a question. Report your thoughts, and finish your answer with the following template: 
+FINAL ANSWER: [YOUR FINAL ANSWER]. 
 
-When I ask a question, please:
-1. Share your reasoning process
-2. End with "FINAL ANSWER: [YOUR ANSWER]"
+Your response must be as concise as possible:
+1. YOUR FINAL ANSWER should be a number OR as few words as possible OR a comma separated list of numbers and/or strings.
+2. If asked for a number, don't use commas, currency symbols, or percent signs unless specifically requested.
+3. If asked for a string, avoid articles and abbreviations (e.g. write full city names), and write digits in plain text unless specified otherwise.
+4. If asked for a comma separated list, apply the above rules to each element.
 
-Your FINAL ANSWER should be:
-- A number (without commas or units like $ or %)
-- As few words as possible
-- Or a comma-separated list of values
+Always prioritize brevity and simplicity. Your answer must start with "FINAL ANSWER: " followed by the minimal response.
 
-For strings, avoid articles and abbreviations, and write digits as text unless specified otherwise.
+Example:
+Question: What is the capital of France?
+Thought: The capital of France is Paris.
+FINAL ANSWER: Paris
 
-Your response must begin with "FINAL ANSWER: " followed directly by your answer.
+Question: What is 25% of 80?
+Thought: To find 25% of 80, I need to multiply 80 by 0.25. 80 × 0.25 = 20.
+FINAL ANSWER: 20