diff --git a/src/tools/search.ts b/src/tools/search.ts
index f3c8cd0..ef5b960 100644
--- a/src/tools/search.ts
+++ b/src/tools/search.ts
@@ -16,16 +16,18 @@ export const searchTool = {
 		filterStructureIds?: string[];
 	}) => {
 		try {
+			// Use the first spaceId — the /lookup endpoint takes a single spaceId
+			const spaceId = args.spaceIds[0];
+
 			const requestBody = {
 				searchTerm: args.searchTerm,
-				spaceIds: args.spaceIds,
-				...(args.mode && { mode: args.mode }),
+				spaceId,
 				...(args.filterStructureIds && {
 					filterStructureIds: args.filterStructureIds,
 				}),
 			};
 
-			const response = await makeApiRequest("/search", {
+			const response = await makeApiRequest("/lookup", {
 				method: "POST",
 				body: JSON.stringify(requestBody),
 			});