diff --git a/src/module/utils.ts b/src/module/utils.ts
index 668a9bf..a3038fe 100644
--- a/src/module/utils.ts
+++ b/src/module/utils.ts
@@ -4,6 +4,14 @@
 
 import { getGameSafe } from "./helpers";
 
+/**
+ * Tests if the given `value` is truthy.
+ *
+ * If it is not truthy, an {@link Error} is thrown, which depends on the given `message` parameter:
+ * - If `message` is a string`, it is used to construct a new {@link Error} which then is thrown.
+ * - If `message` is an instance of {@link Error}, it is thrown.
+ * - If `message` is `undefined`, an {@link Error} with a default message is thrown.
+ */
 export function enforce(value: unknown, message?: string | Error): asserts value {
     if (!value) {
         if (!message) {