diff --git a/codex-rs/core/src/tools/handlers/send_message_to_user_async.rs b/codex-rs/core/src/tools/handlers/send_message_to_user_async.rs
index 2dcc61ee93..4d390028f1 100644
--- a/codex-rs/core/src/tools/handlers/send_message_to_user_async.rs
+++ b/codex-rs/core/src/tools/handlers/send_message_to_user_async.rs
@@ -43,7 +43,7 @@ impl ToolExecutor<ToolInvocation> for SendMessageToUserAsyncHandler {
 
         ToolSpec::Function(ResponsesApiTool {
             name: TOOL_NAME.to_string(),
-            description: "Send a concise message that needs the user's attention during ongoing work. The tool returns immediately without ending the turn or waiting for a reply; any reply arrives asynchronously as a new user message. Use this tool to ask for missing information, preferences, constraints, clarification, or approval; report a critical blocker or a finding that may change the task's direction; or answer a user question or status request received while work is still in progress. Use this tool when a message needs the user's immediate attention; use commentary for routine progress and intermediate context. Use clear formatting, such as bolding questions, to make requests easy to notice and answer."
+            description: "Send a concise message that needs the user's attention during ongoing work. The tool returns immediately without ending the turn or waiting for a reply; any reply arrives asynchronously as a new user message. Use this tool to report a critical blocker or a finding that may change the task's direction, or to answer a user question or status request received while work is still in progress. Use this tool when a message needs the user's immediate attention; use commentary for routine progress and intermediate context. Use clear formatting, such as bolding questions, to make requests easy to notice and answer."
                 .to_string(),
             strict: false,
             defer_loading: None,