diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tool_bridge.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tool_bridge.rs
index 254ebd93e..d1d39fac5 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tool_bridge.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tool_bridge.rs
@@ -1,6 +1,8 @@
 use super::*;
 use crate::agent::tool::apply_patch::error::ApplyPatchError;
-use crate::agent::tool::arguments::{optional_text, page, required_text, ToolPage, ToolTextField};
+use crate::agent::tool::arguments::{
+    not_text_repr, optional_text, page, required_text, ToolPage, ToolTextField,
+};
 use crate::agent::tool::browser_playtest::error::BrowserPlaytestError;
 #[cfg(all(windows, feature = "cocos-editor-execute"))]
 use crate::agent::tool::cocos_execute::error::CocosExecuteError;
@@ -2398,7 +2400,7 @@ pub(in crate::agent) fn remove_background_input(
                 value
                     .as_str()
                     .ok_or_else(|| RemoveBackgroundError::BackgroundModeNotText {
-                        got: value.to_string(),
+                        got: not_text_repr(value),
                     })?;
             if !matches!(mode, "complex" | "flat") {
                 return Err(RemoveBackgroundError::BackgroundModeUnsupported {
@@ -2418,7 +2420,7 @@ pub(in crate::agent) fn remove_background_input(
                 value
                     .as_str()
                     .ok_or_else(|| RemoveBackgroundError::ScreenColorNotText {
-                        got: value.to_string(),
+                        got: not_text_repr(value),
                     })?;
             let valid_hex = color.len() == 7
                 && color.starts_with('#')
@@ -2733,7 +2735,7 @@ fn art_preparation_mode(
         Some(Value::String(value)) => DirectTaonierArtPreparationMode::from_tool_value(Some(value))
             .map_err(|_| PrepareGameArtError::ModeUnsupported { got: value.clone() }),
         Some(value) => Err(PrepareGameArtError::ModeNotText {
-            got: value.to_string(),
+            got: not_text_repr(value),
         }),
     }
 }
@@ -2914,7 +2916,7 @@ fn bridge_image_generation_kind(
         Some(Value::String(value)) => value.trim(),
         Some(value) => {
             return Err(GenerateImageError::KindNotText {
-                got: value.to_string(),
+                got: not_text_repr(value),
             })
         }
     };
@@ -4988,6 +4990,20 @@ mod tests {
             oversized_not_text.chars().count()
         );
 
+        let inline_not_text = art_preparation_mode(&json!({
+            "mode": vec!["需要回显但必须截断的模式值"; 40]
+        }))
+        .expect_err("mode 不是字符串时必须被拒绝")
+        .to_user_msg();
+        assert!(
+            inline_not_text.contains("mode 必须是字符串"),
+            "{inline_not_text}"
+        );
+        assert!(
+            inline_not_text.contains('…') && inline_not_text.chars().count() < 200,
+            "内联判类型的字段回显也要限长：{inline_not_text}"
+        );
+
         let brief_not_text = required_text(&json!({ "brief": 5 }), PrepareGameArtTextField::Brief)
             .expect_err("brief 不是字符串时必须被拒绝")
             .to_user_msg();
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/arguments.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/arguments.rs
index 8b49b1f30..fd55ead6d 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/arguments.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/arguments.rs
@@ -14,6 +14,14 @@ use crate::agent::runtime_state::truncate_agent_runtime_text;
 /// 诊断 sidecar；`got` 会同时出现在 `to_user_msg` 和序列化后的 `error` 里。
 const NOT_TEXT_GOT_MAX_CHARS: usize = 120;
 
+/// 把「本该是字符串、实际给了别的类型」的值压成有界回显，供各工具的 `*NotText` 变体拼文案。
+///
+/// 走共享 [`ToolTextField::not_text`] 的字段自动走这里；像抠图 `backgroundMode`、美术准备
+/// `mode`、生成图片 `kind` 这类在解析里内联判类型的字段，也要用同一份口径。
+pub(crate) fn not_text_repr(value: &Value) -> String {
+    truncate_agent_runtime_text(&value.to_string(), NOT_TEXT_GOT_MAX_CHARS)
+}
+
 /// 一个会被边界校验的文本字段。
 pub(crate) trait ToolTextField<E>: Copy {
     fn key(self) -> &'static str;
@@ -42,10 +50,7 @@ pub(crate) fn optional_text<F: ToolTextField<E>, E>(
         return Ok(None);
     };
     let Some(value) = value.as_str() else {
-        return Err(field.not_text(truncate_agent_runtime_text(
-            &value.to_string(),
-            NOT_TEXT_GOT_MAX_CHARS,
-        )));
+        return Err(field.not_text(not_text_repr(value)));
     };
     let value = value.trim();
     if value.is_empty() {