diff --git a/src/github_llms.ts b/src/github_llms.ts
index a00b760..868b497 100644
--- a/src/github_llms.ts
+++ b/src/github_llms.ts
@@ -611,7 +611,7 @@ function fromGithubChoice(
         : "other",
     message: {
       role: "model",
-      content: toolRequestParts
+      content: (toolRequestParts?.length ?? 0) > 0
         ? (toolRequestParts as ToolRequestPart[])
         : [
             jsonMode