use function agent

app.py

@@ -14,6 +14,10 @@ from llama_index.core.agent.workflow import (
     AgentStream,
     ReActAgent,
 )
+from llama_index.core.agent.workflow import FunctionAgent
+from llama_index.core.tools.tool_spec.load_and_search import (
+    LoadAndSearchToolSpec,
+)
 
 
 # (Keep Constants as is)
@@ -53,8 +57,8 @@ class BasicAgent:
             model="models/gemini-2.0-flash",
             api_key=gemini_api_key,
         )
-        agent = AgentWorkflow.from_tools_or_functions(
-            tools_or_functions=[ReverseTextTool,RunPythonFileTool,download_server,wiki_tool,GetChessPosition],
+        agent = FunctionAgent(
+            tools=LoadAndSearchToolSpec.from_defaults([ReverseTextTool,RunPythonFileTool,download_server,wiki_tool,GetChessPosition]).to_tool_list(),
             llm=llm,
             system_prompt=SYSTEM_PROMPT,
         )