diff --git a/src/setup-codeql.ts b/src/setup-codeql.ts
index 37358fb81..450009702 100644
--- a/src/setup-codeql.ts
+++ b/src/setup-codeql.ts
@@ -275,7 +275,7 @@ async function findOverridingToolsInCache(
  * @param features Information about enabled features.
  * @param logger The logger to use.
  *
- * @returns
+ * @returns Information about where the CodeQL CLI we want to use comes from.
  */
 export async function getCodeQLSource(
   toolsInput: string | undefined,