diff --git a/assets/tools_schema.json b/assets/tools_schema.json
index 27b00a38..01078937 100644
--- a/assets/tools_schema.json
+++ b/assets/tools_schema.json
@@ -60,10 +60,10 @@
   }},
   {"type": "function", "function": {
     "name": "ask_user",
-    "description": "Interrupt task to ask user when needing decisions, extra info, or facing unresolvable blockers. Multiple questions should in one call",
+    "description": "Interrupt task to ask user when needing decisions, extra info, or facing unresolvable blockers. For multiple questions, use one call and put all in question—do not call repeatedly.",
     "parameters": {"type": "object", "properties": {
-      "question": {"type": "string", "description": "For multiple questions, one per line (contain candidates)"},
-      "candidates": {"type": "array", "items": {"type": "string"}, "description": "Optional quick-select choices for a single question only. Leave empty for multi-questions"}}}
+      "question": {"type": "string", "description": "Question for the user. For multiple questions, one per line (e.g. \"1. …\" / \"2. …\" or \"Q1: …\"); put A/B/C options under each question in this field. Do not cram multiple questions on one line. candidates is for single-question quick picks only."},
+      "candidates": {"type": "array", "items": {"type": "string"}, "description": "Optional quick-select choices for a single question only. Leave empty for multi-question prompts; put per-question options in question instead."}}}
   }},
   {"type": "function", "function": {
     "name": "start_long_term_update",
diff --git a/assets/tools_schema_cn.json b/assets/tools_schema_cn.json
index 98fbc211..0b70328c 100644
--- a/assets/tools_schema_cn.json
+++ b/assets/tools_schema_cn.json
@@ -60,10 +60,10 @@
   }},
   {"type": "function", "function": {
     "name": "ask_user",
-    "description": "当需要用户决策、提供额外信息或遇到无法自动解决的阻碍时，调用此工具中断任务并提问。多题时应一次调用",
+    "description": "当需要用户决策、提供额外信息或遇到无法自动解决的阻碍时，调用此工具中断任务并提问。多题应一次调用、全部写在 question 里，不要多次调用。",
     "parameters": {"type": "object", "properties": {
-      "question": {"type": "string", "description": "多题时每题*独占*一行（带选项）"},
-      "candidates": {"type": "array", "items": {"type": "string"}, "description": "仅单题时可用。多题时留空"}}}
+      "question": {"type": "string", "description": "向用户提出的明确问题。多题时每题独占一行（如「1. …」「2. …」或「问题1: …」），每题下的选项用 A. B. C. 写在 question 内；不要用一行挤多题。candidates 仅用于单题快捷选项。"},
+      "candidates": {"type": "array", "items": {"type": "string"}, "description": "单题时的可选快捷选项（纯文字）。多题时留空，各题选项写在 question 里，勿把多题选项平铺到此数组。"}}}
   }},
   {"type": "function", "function": {
     "name": "start_long_term_update",
diff --git a/frontends/desktop_bridge.py b/frontends/desktop_bridge.py
index 2ff937aa..0d441275 100644
--- a/frontends/desktop_bridge.py
+++ b/frontends/desktop_bridge.py
@@ -418,26 +418,21 @@ class AgentManager:
         except Exception as e:
             print(f"get model profiles failed: {e}", file=sys.stderr)
             return []
+        _, mcfg = self._mixin_entry(keys, mk)
+        members = [str(m) for m in (mcfg.get("llm_nos") or [])] if mcfg else []
         active = self.config.get("llmNo", 0)
-        # collect all mixin members for inMixin check
-        all_mixin_members: set = set()
-        for k in keys:
-            if "mixin" in k:
-                c = mk.get(k) if isinstance(mk.get(k), dict) else {}
-                all_mixin_members.update(str(m) for m in (c.get("llm_nos") or []))
         out = []
         for i, k in enumerate(keys):
             cfg = mk.get(k) if isinstance(mk.get(k), dict) else {}
             if "mixin" in k:
-                mems = [str(m) for m in (cfg.get("llm_nos") or [])]
                 out.append({"id": i, "varName": k, "kind": "mixin", "name": "",
-                            "members": mems, "active": i == active})
+                            "members": members, "active": i == active})
             else:
                 name = self._base_display_name(k, cfg)
                 out.append({"id": i, "varName": k, "kind": "native", "name": name,
                             "model": cfg.get("model", ""),
                             "group": "native" if "native" in k else "std",
-                            "inMixin": name in all_mixin_members, "active": i == active})
+                            "inMixin": name in members, "active": i == active})
         return out
 
     def add_to_mixin(self, profile_id: int) -> dict: