Update app.py

app.py

@@ -310,9 +310,8 @@ class RetrievalTool(Tool):
     }
     output_type = "string"
 
-    class RetrievalTool(Tool):
-    # ... (rest of class definition) ...
-        def forward(self, query: str, k: int = 3) -> str:
+
+    def forward(self, query: str, k: int = 3) -> str:
         if vectorstore is None or embeddings is None: # Added check for embeddings
             return "Vector store is not initialized or embeddings are missing. No documents available for retrieval."
         
@@ -329,6 +328,7 @@ class RetrievalTool(Tool):
             logger.error(f"Error retrieving from vector store for query '{query}': {e}")
             return f"Error retrieving from vector store: {str(e)}"
 
+
 class ChessAnalysisAPITool(Tool):
     """
     Analyzes a chess position provided in FEN format using a remote chess engine API (chess-api.com).