Update server.py

server.py

@@ -139,7 +139,7 @@ def retrieve_docs(
     Ejemplo:
         retrieve_docs(
             query="estándares farmacéuticos",
-            retrievers=["vec_who_1"],
+            retrievers=["vec_who_1", "vec_who_2"],
             top_k=2
         )
     """
@@ -152,16 +152,20 @@ def retrieve_docs(
             continue
             
         try:
+            # 1. Obtener el índice y realizar la búsqueda
             retriever = indices[name].as_retriever(similarity_top_k=top_k)
             nodes = retriever.retrieve(query)
             
-            # Obtener metadatos
-            metadata = next(
-                (meta for src in retrievers_metadata.values() 
-                 for idx, meta in src.items() if idx == name),
-                {}
-            )
+            # 2. Buscar metadatos COMPLETOS
+            metadata = {}
+            source = "unknown"
+            for src, indexes in retrievers_metadata.items():
+                if name in indexes:
+                    metadata = indexes[name]
+                    source = src
+                    break
             
+            # 3. Construir respuesta para ESTE retriever
             results[name] = {
                 "title": metadata.get("title", name),
                 "documents": [
@@ -173,18 +177,22 @@ def retrieve_docs(
                     for node in nodes
                 ],
                 "description": metadata.get("description", ""),
-                "source": next(
-                    (s for s, idx in retrievers_metadata.items() if name in idx),
-                    "unknown"
-                )
+                "source": source,
+                "last_updated": metadata.get("last_updated", "")
             }
+            
         except Exception as e:
-            results[name] = {"error": str(e)}
+            results[name] = {
+                "error": str(e),
+                "retriever": name
+            }
     
+    # Construir respuesta final
     response = {
         "query": query,
         "results": results,
-        "top_k": top_k
+        "top_k": top_k,
+        "timestamp": datetime.datetime.now().isoformat()
     }
     
     if invalid:
@@ -195,7 +203,6 @@ def retrieve_docs(
     
     return response
 
-
     
 
 @mcp.tool()