diff --git a/mcp-metabase-server/src/index.ts b/mcp-metabase-server/src/index.ts
index 41ee552..1b3e773 100644
--- a/mcp-metabase-server/src/index.ts
+++ b/mcp-metabase-server/src/index.ts
@@ -310,7 +310,7 @@ server.registerTool(
       const collections = await metabaseFetch<any[]>('/api/collection');
       return {
         content: [{ type: 'text', text: JSON.stringify(collections, null, 2) }],
-        structuredContent: collections
+        structuredContent: { collections }
       };
     } catch (error) {
       const errorMsg = error instanceof Error ? error.message : 'Error desconocido';
@@ -353,13 +353,13 @@ server.registerTool(
         );
         return {
           content: [{ type: 'text', text: JSON.stringify(databasesWithMetadata, null, 2) }],
-          structuredContent: databasesWithMetadata
+          structuredContent: { databases: databasesWithMetadata }
         };
       }
 
       return {
         content: [{ type: 'text', text: JSON.stringify(databases, null, 2) }],
-        structuredContent: databases
+        structuredContent: { databases }
       };
     } catch (error) {
       const errorMsg = error instanceof Error ? error.message : 'Error desconocido';
@@ -387,7 +387,7 @@ server.registerTool(
       const dashboards = await metabaseFetch<any[]>('/api/dashboard');
       return {
         content: [{ type: 'text', text: JSON.stringify(dashboards, null, 2) }],
-        structuredContent: dashboards
+        structuredContent: { dashboards }
       };
     } catch (error) {
       const errorMsg = error instanceof Error ? error.message : 'Error desconocido';