Update retriever description prompt

app.py

@@ -161,7 +161,7 @@ async def search_with_llm(query: str,
     retriever_tools = [RetrieverTool.from_defaults(
                         name=key,
                         retriever=value,
-                        description=f"Useful for retrieving information about {key} financials") for key, value in retrievers.items()]
+                        description=f"Useful for retrieving information about {key}.") for key, value in retrievers.items()]
     
     retriever_mappings = {retriever_tool.metadata.name: retriever_tool.retriever for retriever_tool in retriever_tools}