diff --git a/packages/core/src/tools/write-file.ts b/packages/core/src/tools/write-file.ts
index 57bfe8ed..dc634cc8 100644
--- a/packages/core/src/tools/write-file.ts
+++ b/packages/core/src/tools/write-file.ts
@@ -129,6 +129,9 @@ export class WriteFileTool extends BaseTool<WriteFileToolParams, ToolResult> {
   }
 
   getDescription(params: WriteFileToolParams): string {
+    if (!params.file_path || !params.content) {
+      return `Model did not provide valid parameters for write file tool`;
+    }
     const relativePath = makeRelative(
       params.file_path,
       this.config.getTargetDir(),