diff --git a/src/mcp/types.ts b/src/mcp/types.ts
index 23c95fda..34dada29 100644
--- a/src/mcp/types.ts
+++ b/src/mcp/types.ts
@@ -403,7 +403,7 @@ export const UpdateSelfTargetingIdentityArgsSchema = z.object({
     dvc_user_id: z
         .string()
         .describe(
-            'DevCycle User ID for self-targeting (use null or empty string to clear)',
+            'DevCycle User ID for self-targeting (empty string to clear)',
         ),
 })