fix: capture final response after tool execution in LLM

When an agent executes tools and the final iteration contains the answer
without additional tool calls, ensure the response text is properly captured
and returned instead of returning empty/None.

This fixes the issue where agents with multiple tools would return empty
responses after successfully executing tools.

Fixes #835

Co-authored-by: Mervin Praison <[email protected]>

Author: claude[bot]

src/praisonai-agents/praisonaiagents/llm/llm.py

@@ -1017,6 +1017,9 @@ def get_response(
                         return final_response_text
                     else:
                         # No tool calls, we're done with this iteration
+                        # If we've executed tools in previous iterations, this response contains the final answer
+                        if iteration_count > 0:
+                            final_response_text = response_text.strip()
                         break
 
                 except Exception as e:

test_issue_835.py

@@ -0,0 +1,34 @@
+from praisonaiagents import Agent
+
+def get_stock_price(company_name: str) -> str:
+    """
+    Get the stock price of a company
+    
+    Args:
+        company_name (str): The name of the company
+        
+    Returns:
+        str: The stock price of the company
+    """
+    return f"The stock price of {company_name} is 100"
+
+def multiply(a: int, b: int) -> int:
+    """
+    Multiply two numbers
+    """
+    return a * b
+
+# Test the agent
+agent = Agent(
+    instructions="You are a helpful assistant. You can use the tools provided to you to help the user.",
+    llm="openai/gpt-4o-mini",
+    tools=[get_stock_price, multiply],
+    verbose=True  # Enable verbose to see what's happening
+)
+
+print("=== Testing Agent with Multiple Tools ===")
+result = agent.start("multiply the Google stock price with 2")
+print(f"\nFinal Result: {result}")
+print(f"Result Type: {type(result)}")
+print(f"Is None: {result is None}")
+print(f"Is Empty String: {result == ''}")