Create a message ID for tool response messages (#3591)

crates/goose/src/agents/agent.rs

@@ -6,6 +6,7 @@ use std::sync::Arc;
 use anyhow::{anyhow, Result};
 use futures::stream::BoxStream;
 use futures::{stream, FutureExt, Stream, StreamExt, TryStreamExt};
+use uuid::Uuid;
 
 use crate::agents::extension::{ExtensionConfig, ExtensionError, ExtensionResult, ToolInfo};
 use crate::agents::extension_manager::{get_parameter_names, ExtensionManager};
@@ -871,7 +872,9 @@ impl Agent {
                                     continue;
                                 }
 
-                                let message_tool_response = Arc::new(Mutex::new(Message::user()));
+                                let message_tool_response = Arc::new(Mutex::new(Message::user().with_id(
+                                    format!("msg_{}", Uuid::new_v4())
+                                )));
 
                                 let mut frontend_tool_stream = self.handle_frontend_tool_requests(
                                     &frontend_requests,

crates/goose/src/message.rs

@@ -423,6 +423,11 @@ impl Message {
         }
     }
 
+    pub fn with_id<S: Into<String>>(mut self, id: S) -> Self {
+        self.id = Some(id.into());
+        self
+    }
+
     /// Add any MessageContent to the message
     pub fn with_content(mut self, content: MessageContent) -> Self {
         self.content.push(content);