diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/create_or_derive_resource/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/create_or_derive_resource/error.rs
index b735eb645..202e1440a 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/create_or_derive_resource/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/create_or_derive_resource/error.rs
@@ -254,7 +254,9 @@ impl ToolFailure for CreateOrDeriveResourceError {
             Self::ProjectRevisionUnavailable { cause } => {
                 format!("生成或派生资源失败：读取项目 revision 失败：{cause}")
             }
-            Self::RemoteGenerationFailed(failure) => failure.to_user_msg(),
+            Self::RemoteGenerationFailed(failure) => {
+                format!("生成或派生资源失败：{}", failure.to_user_msg())
+            }
             Self::ResourceGenerationFailed { cause } => {
                 format!("生成或派生资源失败：{cause}")
             }
@@ -289,7 +291,7 @@ mod tests {
             },
         );
 
-        assert_eq!(error.to_user_msg(), "资源编辑生成失败：provider detail");
+        assert_eq!(error.to_user_msg(), "生成或派生资源失败：provider detail");
         assert_eq!(
             serde_json::to_value(&error).expect("serialize typed failure")
                 ["RemoteGenerationFailed"]["server_message"],
@@ -305,7 +307,10 @@ mod tests {
             },
         );
 
-        assert_eq!(error.to_user_msg(), "资源编辑生成失败");
+        assert_eq!(
+            error.to_user_msg(),
+            "生成或派生资源失败：服务器未返回错误信息"
+        );
     }
 
     #[test]
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/error.rs
index f6eab4fc6..734f2b335 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/error.rs
@@ -182,8 +182,8 @@ impl ToolFailure for ResourceCompletionRejection {
 /// 平台把远端资源编辑判成终态 `failed` 时给出的原因。
 ///
 /// `agc_create_or_derive_resource` 与 `agc_remove_background` 走的是同一条远端资源编辑
-/// 通道，平台 `error` 原文必须作为数据原样带出（不是在产生点拼进前缀），两个工具共用
-/// 这一层文案。
+/// 通道，平台 `error` 原文必须作为数据原样带出（不是在产生点拼进前缀）。这里只负责
+/// 原文与「平台没给」的兜底，前缀由使用它的工具在自己的变体里加，两个工具共用这一份载体。
 #[derive(serde::Serialize, Debug)]
 pub(crate) struct RemoteResourceEditFailure {
     /// 平台 `error` 字段原文；平台没给时为空。
@@ -193,8 +193,8 @@ pub(crate) struct RemoteResourceEditFailure {
 impl ToolFailure for RemoteResourceEditFailure {
     fn to_user_msg(&self) -> String {
         match &self.server_message {
-            Some(server_message) => format!("资源编辑生成失败：{server_message}"),
-            None => "资源编辑生成失败".to_string(),
+            Some(server_message) => server_message.clone(),
+            None => "服务器未返回错误信息".to_string(),
         }
     }
 }
@@ -274,3 +274,26 @@ impl ToolFailure for DirectExecutionGateRejection {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn remote_resource_edit_failure_keeps_platform_text_verbatim() {
+        let failure = RemoteResourceEditFailure {
+            server_message: Some("provider detail".to_string()),
+        };
+
+        assert_eq!(failure.to_user_msg(), "provider detail");
+    }
+
+    #[test]
+    fn remote_resource_edit_failure_without_message_blames_the_server() {
+        let failure = RemoteResourceEditFailure {
+            server_message: None,
+        };
+
+        assert_eq!(failure.to_user_msg(), "服务器未返回错误信息");
+    }
+}
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/remove_background/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/remove_background/error.rs
index 1dd849593..f34b8c131 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/remove_background/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/remove_background/error.rs
@@ -175,7 +175,9 @@ impl ToolFailure for RemoveBackgroundError {
             Self::ProjectRevisionUnavailable { cause } => {
                 format!("抠图失败：读取项目 revision 失败：{cause}")
             }
-            Self::RemoteGenerationFailed(failure) => failure.to_user_msg(),
+            Self::RemoteGenerationFailed(failure) => {
+                format!("抠图失败：{}", failure.to_user_msg())
+            }
             Self::BackgroundRemovalFailed { cause } => format!("抠图失败：{cause}"),
         }
     }
@@ -208,7 +210,7 @@ mod tests {
             },
         );
 
-        assert_eq!(error.to_user_msg(), "资源编辑生成失败：provider detail");
+        assert_eq!(error.to_user_msg(), "抠图失败：provider detail");
         assert_eq!(
             serde_json::to_value(&error).expect("serialize typed failure")
                 ["RemoteGenerationFailed"]["server_message"],
@@ -224,7 +226,7 @@ mod tests {
             },
         );
 
-        assert_eq!(error.to_user_msg(), "资源编辑生成失败");
+        assert_eq!(error.to_user_msg(), "抠图失败：服务器未返回错误信息");
     }
 
     #[test]