diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/binding.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/binding.rs
index 797f8c44d..ef68263f8 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/binding.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/binding.rs
@@ -2,7 +2,7 @@ use crate::config::build_game_creator_llm_client_from_llm_config;
 use crate::config::load_game_creator_app_config;
 use crate::ui_editor::commands::utils::{
     parse_limited_llm_tool_arguments, read_ui_reference_image_data_url, request_ui_editor_llm,
-    strict_json_schema,
+    required_tool_call_arguments, strict_json_schema,
 };
 use crate::ui_editor::component::text::FontSource;
 use crate::ui_editor::component::{Component, NodeComponent};
@@ -406,12 +406,8 @@ pub(crate) async fn bind_components_impl_with_provider(
         .await
     }
     .map_err(|error| format!("组件绑定失败：{error}"))?;
-    let call = response
-        .tool_calls
-        .iter()
-        .find(|call| call.name == "bind_ui_components")
-        .ok_or_else(|| "LLM 未返回 bind_ui_components 工具调用".to_string())?;
-    let parsed = parse_binding_response(&call.arguments, editable_nodes.len())?;
+    let arguments = required_tool_call_arguments(&response, "bind_ui_components")?;
+    let parsed = parse_binding_response(arguments, editable_nodes.len())?;
     let known_sprite_ids = state.sprite_assets.keys().cloned().collect::<HashSet<_>>();
     let known_font_ids = state.font_assets.keys().cloned().collect::<HashSet<_>>();
     let result = validate_and_materialize(
diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/merge.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/merge.rs
index 254d43774..1b1af1ea2 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/merge.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/merge.rs
@@ -1,7 +1,7 @@
 use crate::config::build_game_creator_llm_client_from_llm_config;
 use crate::config::load_game_creator_app_config;
 use crate::ui_editor::commands::utils::{
-    parse_limited_llm_tool_arguments, request_ui_editor_llm, strict_json_schema,
+    request_ui_editor_llm, required_tool_arguments, strict_json_schema,
 };
 use crate::ui_editor::state::{State, UITree};
 use platform_llm::{LlmFunctionTool, LlmMessage, LlmRunRequest, LlmToolChoice};
@@ -487,15 +487,7 @@ pub(crate) async fn merge_ui_impl_with_provider(
         app_log!("ui_merge.error stage=llm_request error={error}");
         format!("UI 树合并失败：{error}")
     })?;
-    let call = response
-        .tool_calls
-        .iter()
-        .find(|call| call.name == MERGE_TOOL_NAME)
-        .ok_or_else(|| {
-            app_log!("ui_merge.error stage=parse_tool_call reason=missing_tool_call");
-            format!("LLM 未返回 {MERGE_TOOL_NAME} 工具调用")
-        })?;
-    let arguments = parse_limited_llm_tool_arguments(&call.arguments).map_err(|error| {
+    let arguments = required_tool_arguments(&response, MERGE_TOOL_NAME).map_err(|error| {
         app_log!("ui_merge.error stage=parse_arguments error={error}");
         format!("UI 合并工具参数无效：{error}")
     })?;
diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/recognition.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/recognition.rs
index f7acf69e9..039679e31 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/recognition.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/recognition.rs
@@ -1,7 +1,7 @@
 use crate::config::build_game_creator_llm_client_from_llm_config;
 use crate::config::load_game_creator_app_config;
 use crate::ui_editor::commands::utils::{
-    parse_limited_llm_tool_arguments, read_ui_reference_image_data_url, request_ui_editor_llm,
+    read_ui_reference_image_data_url, request_ui_editor_llm, required_tool_arguments,
     strict_json_schema,
 };
 use crate::ui_editor::component::{Component, NodeComponent};
@@ -13,7 +13,7 @@ use crate::ui_editor::layout::offset::NodeOffset;
 use crate::ui_editor::layout::transform::Transform;
 use crate::ui_editor::resource::ui_design_image::UIDesignImage;
 use crate::ui_editor::state::{State, UITree};
-use crate::ui_editor::utils::{random_node_id, NodeId, UIDesignImageId};
+use crate::ui_editor::utils::{random_node_id, UIDesignImageId};
 use nalgebra::{Point2, Vector2};
 use platform_llm::{
     LlmFunctionTool, LlmMessage, LlmMessageContentPart, LlmRunRequest, LlmToolChoice,
@@ -770,27 +770,14 @@ pub(crate) async fn recognize_ui_impl_with_provider(
             !response.text.trim().is_empty(),
             response.tool_calls.len()
         );
-        let call = response
-            .tool_calls
-            .iter()
-            .find(|call| call.name == "recognize_ui_structure")
-            .ok_or_else(|| {
+        let arguments =
+            required_tool_arguments(&response, "recognize_ui_structure").map_err(|error| {
                 app_log!(
-                    "ui_recognition.error stage=parse_tool_call root={} reason=missing_tool_call",
+                    "ui_recognition.error stage=parse_arguments root={} error={error}",
                     root_id.as_str()
                 );
-                format!(
-                    "根界面图 {} 的 LLM 未返回 recognize_ui_structure 工具调用",
-                    root_id.as_str()
-                )
+                format!("根界面图 {} 的识别工具参数无效：{error}", root_id.as_str())
             })?;
-        let arguments = parse_limited_llm_tool_arguments(&call.arguments).map_err(|error| {
-            app_log!(
-                "ui_recognition.error stage=parse_arguments root={} error={error}",
-                root_id.as_str()
-            );
-            format!("根界面图 {} 的识别工具参数无效：{error}", root_id.as_str())
-        })?;
         validate_recognition_response_shape(&arguments).map_err(|error| {
             app_log!(
                 "ui_recognition.error stage=validate_arguments root={} error={error}",
diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/ui_design_suggestion.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/ui_design_suggestion.rs
index 613d44b7b..749c12f0f 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/ui_design_suggestion.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/ui_design_suggestion.rs
@@ -1,7 +1,7 @@
 use crate::config::build_game_creator_llm_client_from_llm_config;
 use crate::config::load_game_creator_app_config;
 use crate::ui_editor::commands::utils::{
-    parse_limited_llm_tool_arguments, read_ui_reference_image_data_url, request_ui_editor_llm,
+    read_ui_reference_image_data_url, request_ui_editor_llm, required_tool_arguments,
     strict_json_schema,
 };
 use crate::ui_editor::resource::ui_design_image::UIDesignImageRole;
@@ -214,18 +214,11 @@ pub(crate) async fn suggest_ui_design_semantic_impl(
         !response.text.trim().is_empty(),
         response.tool_calls.len()
     );
-    let call = response
-        .tool_calls
-        .iter()
-        .find(|call| call.name == "suggest_ui_design_semantics")
-        .ok_or_else(|| {
-            app_log!("ui_design_suggestion.error stage=parse_tool_call reason=missing_tool_call");
-            "LLM 响应无效（详情：未返回 suggest_ui_design_semantics 工具调用）".to_string()
+    let arguments =
+        required_tool_arguments(&response, "suggest_ui_design_semantics").map_err(|error| {
+            app_log!("ui_design_suggestion.error stage=parse_arguments error={error}");
+            format!("LLM 响应无效（详情：UI 语义建议工具参数无效：{error}）")
         })?;
-    let arguments = parse_limited_llm_tool_arguments(&call.arguments).map_err(|error| {
-        app_log!("ui_design_suggestion.error stage=parse_arguments error={error}");
-        format!("LLM 响应无效（详情：UI 语义建议工具参数无效：{error}）")
-    })?;
     validate_suggestion_response_shape(&arguments).map_err(|error| {
         app_log!("ui_design_suggestion.error stage=validate_arguments error={error}");
         format!("LLM 响应无效（详情：{error}）")
diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/utils.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/utils.rs
index 852a23c9d..f5d876e2f 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/utils.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/utils.rs
@@ -95,6 +95,29 @@ pub(crate) fn parse_limited_llm_tool_arguments(
     serde_json::from_str(arguments).map_err(|error| format!("LLM 工具参数不是有效 JSON：{error}"))
 }
 
+/// Stable structured-action adapter: locate the required tool call and parse its
+/// bounded JSON arguments. Prompt, schema and materialization stay in each
+/// operation-specific command.
+pub(crate) fn required_tool_arguments(
+    response: &LlmRunResponse,
+    tool_name: &str,
+) -> Result<serde_json::Value, String> {
+    let arguments = required_tool_call_arguments(response, tool_name)?;
+    parse_limited_llm_tool_arguments(arguments)
+}
+
+pub(crate) fn required_tool_call_arguments<'a>(
+    response: &'a LlmRunResponse,
+    tool_name: &str,
+) -> Result<&'a str, String> {
+    response
+        .tool_calls
+        .iter()
+        .find(|call| call.name == tool_name)
+        .map(|call| call.arguments.as_str())
+        .ok_or_else(|| format!("LLM 未返回 {tool_name} 工具调用"))
+}
+
 pub(crate) async fn read_ui_reference_image_data_url(path: PathBuf) -> Result<String, String> {
     tokio::task::spawn_blocking(move || read_ui_reference_image_data_url_blocking(&path))
         .await