diff --git a/src/Tool.ts b/src/Tool.ts
index 205cac0..7ac0551 100644
--- a/src/Tool.ts
+++ b/src/Tool.ts
@@ -790,3 +790,4 @@ export function buildTool<D extends AnyToolDef>(def: D): BuiltTool<D> {
     ...def,
   } as BuiltTool<D>
 }
+