diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/browser_playtest/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/browser_playtest/error.rs
index 55291cfda..783dad21c 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/browser_playtest/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/browser_playtest/error.rs
@@ -2,7 +2,7 @@
 //!
 //! 这里只放错误本身；参数解析与工具执行留在 `direct_tool_bridge` 与 `direct_validation`。
 
-use crate::agent::tool::error::ToolFailure;
+use crate::agent::tool::error::{bounded_report_text, ToolFailure};
 use serde_json::Value;
 
 /// `agc_browser_playtest` 的每一种失败各占一个变体；文案写在这里，捕获处只调 `to_user_msg`。
@@ -25,7 +25,12 @@ impl ToolFailure for BrowserPlaytestError {
     fn to_user_msg(&self) -> String {
         match self {
             Self::PlaytestFailed { cause } => cause.to_string(),
-            Self::PlaytestNotPassed { report, .. } => format!("浏览器试玩未通过：{report}"),
+            Self::PlaytestNotPassed { report, .. } => {
+                format!(
+                    "浏览器试玩未通过：{}",
+                    bounded_report_text(report, self.redact_limit())
+                )
+            }
         }
     }
 
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/cocos_execute/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/cocos_execute/error.rs
index b0146f279..1ae4cb232 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/cocos_execute/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/cocos_execute/error.rs
@@ -2,7 +2,9 @@
 //!
 //! 这里只放错误本身；参数解析与工具执行留在 `direct_tool_bridge`。
 
-use crate::agent::tool::error::{ProjectPermissionRejection, ToolArgumentsRejection, ToolFailure};
+use crate::agent::tool::error::{
+    bounded_report_text, ProjectPermissionRejection, ToolArgumentsRejection, ToolFailure,
+};
 use serde_json::Value;
 
 /// Cocos 执行工具的每一种失败各占一个变体；文案写在这里，捕获处只调 `to_user_msg`。
@@ -77,7 +79,10 @@ impl ToolFailure for CocosExecuteError {
                     .to_string()
             }
             Self::ExecutionNotCompleted { report, .. } => {
-                format!("Cocos 执行未完成：{report}")
+                format!(
+                    "Cocos 执行未完成：{}",
+                    bounded_report_text(report, self.redact_limit())
+                )
             }
         }
     }
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/editor_execute/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/editor_execute/error.rs
index 55e0f0138..197b99344 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/editor_execute/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/editor_execute/error.rs
@@ -2,7 +2,9 @@
 //!
 //! 这里只放错误本身；参数解析与工具执行留在 `direct_tool_bridge`。
 
-use crate::agent::tool::error::{ProjectPermissionRejection, ToolArgumentsRejection, ToolFailure};
+use crate::agent::tool::error::{
+    bounded_report_text, ProjectPermissionRejection, ToolArgumentsRejection, ToolFailure,
+};
 use serde_json::Value;
 
 /// `code` 的长度上限（字节）：编辑器适配器按 UTF-8 字节数收代码。
@@ -106,7 +108,11 @@ impl ToolFailure for EditorExecuteError {
             } => format!("code 有 {got_bytes} 字节，超过上限 {max_bytes} 字节。"),
             Self::EditorRejected { cause } => cause.to_string(),
             Self::ExecutionNotCompleted { editor, report } => {
-                format!("{} 执行未完成：{report}", editor.label())
+                format!(
+                    "{} 执行未完成：{}",
+                    editor.label(),
+                    bounded_report_text(report, self.redact_limit())
+                )
             }
             Self::ExecutionUnconfirmed { editor } => format!(
                 "{} 执行任务异常，回执不可用；执行已发出，结果待核对，不要自动重放：\
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/environment_check/error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/environment_check/error.rs
index 8095c054c..31afb63ae 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/tool/environment_check/error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/tool/environment_check/error.rs
@@ -2,7 +2,9 @@
 //!
 //! 这里只放错误本身；参数解析与工具执行留在 `direct_tool_bridge`。
 
-use crate::agent::tool::error::{ProjectPermissionRejection, ToolArgumentsRejection, ToolFailure};
+use crate::agent::tool::error::{
+    bounded_report_text, ProjectPermissionRejection, ToolArgumentsRejection, ToolFailure,
+};
 use serde_json::Value;
 
 /// `agc_environment_check` 不接受任何参数，所以它自己的失败只有权限门禁与环境未就绪两类。
@@ -33,7 +35,10 @@ impl ToolFailure for EnvironmentCheckError {
         match self {
             Self::Arguments(rejection) => rejection.to_user_msg(),
             Self::PermissionDenied(rejection) => rejection.to_user_msg(),
-            Self::EnvironmentNotReady { report } => format!("本地环境未就绪：{report}"),
+            Self::EnvironmentNotReady { report } => format!(
+                "本地环境未就绪：{}",
+                bounded_report_text(report, self.redact_limit())
+            ),
         }
     }
 
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 43f9ee47f..2c1ada9ab 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
@@ -17,6 +17,15 @@ pub(crate) fn bounded_echo(text: &str) -> String {
     crate::agent::runtime_state::truncate_agent_runtime_text(text, BOUNDED_ECHO_MAX_CHARS)
 }
 
+/// 工具回执一类的 JSON 载荷落进 message 前的有界序列化。
+///
+/// [`ToolFailure::to_user_msg`] 的结果之后还要过整条脱敏流水线，最后才按
+/// [`ToolFailure::redact_limit`] 截断；先按同一预算截一次，避免整份大载荷在多趟脱敏里
+/// 被反复搬运。
+pub(crate) fn bounded_report_text(value: &Value, max_chars: usize) -> String {
+    crate::agent::runtime_state::truncate_agent_runtime_text(&value.to_string(), max_chars)
+}
+
 /// `sourceLocalAssetId` 不在当前项目 manifest 时的完整指引：模型要知道下一步做什么，
 /// 只报「不属于已登记资源」会让它原地重试。
 ///