diff --git a/runtime/application/gateway/channel_turn_gate.py b/runtime/application/gateway/channel_turn_gate.py
index 7307611d..6283b8dd 100644
--- a/runtime/application/gateway/channel_turn_gate.py
+++ b/runtime/application/gateway/channel_turn_gate.py
@@ -30,16 +30,30 @@ def merge_channel_pending_jobs(jobs: list[dict[str, Any]]) -> dict[str, Any]:
 
     lang = str(rows[-1].get("lang") or "").strip().lower()
     if lang.startswith("zh"):
-        header = "处理上一问期间又收到多条跟进，请一并回答："
+        header = "处理上一问期间又收到多条跟进，请按发言人分别回答："
     else:
-        header = "Several follow-up questions arrived while the previous request was still running. Please answer them together:"
+        header = (
+            "Several follow-up questions arrived while the previous request was still running. "
+            "Answer each item for its own sender:"
+        )
 
     parts: list[str] = []
     attachments: list[dict[str, Any]] = []
     for idx, job in enumerate(rows, start=1):
         text = str(job.get("user_text") or "").strip()
+        md = job.get("msg_metadata") if isinstance(job.get("msg_metadata"), dict) else {}
+        sender = str(
+            md.get("group_sender_label")
+            or md.get("push_name")
+            or md.get("group_sender_id")
+            or md.get("external_user_id")
+            or ""
+        ).strip()
         if text:
-            parts.append(f"{idx}) {text}")
+            if sender and not text.lstrip().startswith(("[Sender:", "[发言:")):
+                parts.append(f"{idx}) [{sender}] {text}")
+            else:
+                parts.append(f"{idx}) {text}")
         for att in job.get("attachments") or []:
             if isinstance(att, dict):
                 attachments.append(att)
diff --git a/runtime/application/gateway/inbound_service.py b/runtime/application/gateway/inbound_service.py
index 0342d57c..519b9c50 100644
--- a/runtime/application/gateway/inbound_service.py
+++ b/runtime/application/gateway/inbound_service.py
@@ -1376,6 +1376,7 @@ def process_inbound_payload(payload: dict[str, Any]) -> dict[str, Any]:
                                 tenant_id=str(tenant_id or ""),
                                 account_id=wa_acct,
                                 quoted_ctx=quoted_ctx,
+                                lang=lang,
                             )
                         if not user_text and gw_attachments:
                             user_text = (
@@ -1388,6 +1389,17 @@ def process_inbound_payload(payload: dict[str, Any]) -> dict[str, Any]:
                             from runtime.types import StandardMessage
                             from runtime.application.gateway.channel_turn_gate import get_channel_turn_gate
 
+                            raw_meta = (
+                                meta_for_inbound.get("raw")
+                                if isinstance(meta_for_inbound.get("raw"), dict)
+                                else {}
+                            )
+                            sender_label = str(
+                                raw_meta.get("pushName")
+                                or meta_for_inbound.get("push_name")
+                                or inbound.external_user_id
+                                or ""
+                            ).strip()
                             msg_metadata = {
                                 "tenant_id": tenant_id,
                                 "user_id": user_id,
@@ -1400,6 +1412,9 @@ def process_inbound_payload(payload: dict[str, Any]) -> dict[str, Any]:
                                 "external_user_id": inbound.external_user_id,
                                 "external_chat_id": inbound.external_chat_id,
                                 "group_sender_id": inbound.external_user_id,
+                                "group_sender_label": sender_label,
+                                "push_name": sender_label,
+                                "group_session_scope": group_policy.session_scope,
                                 "mentioned_jids": mention_jids_for_ctx,
                                 "mention_names": mention_names_for_ctx,
                                 "raw_inbound_text": raw_user_text,
@@ -1436,12 +1451,20 @@ def process_inbound_payload(payload: dict[str, Any]) -> dict[str, Any]:
                                                 busy_meta = build_whatsapp_group_progress_metadata(
                                                     inbound=inbound
                                                 )
-                                            busy_text = (
-                                                "还在处理上一条请求，这条会排队合并处理。"
-                                                if str(lang or "").startswith("zh")
-                                                else "Still working on your previous request; "
-                                                "I'll merge this follow-up next."
-                                            )
+                                            if str(lang or "").startswith("zh"):
+                                                busy_text = (
+                                                    "本会话还有请求在处理，你这条已排队，完成后会继续回答。"
+                                                    if bool(getattr(inbound, "is_group", False))
+                                                    else "还在处理上一条请求，这条会排队合并处理。"
+                                                )
+                                            else:
+                                                busy_text = (
+                                                    "Still working on an earlier request in this chat; "
+                                                    "your message is queued and will be answered next."
+                                                    if bool(getattr(inbound, "is_group", False))
+                                                    else "Still working on your previous request; "
+                                                    "I'll merge this follow-up next."
+                                                )
                                             _enqueue_whatsapp_inbound_reply(
                                                 store,
                                                 inbound=inbound,
diff --git a/runtime/gateway.py b/runtime/gateway.py
index 6be61542..079f14a8 100644
--- a/runtime/gateway.py
+++ b/runtime/gateway.py
@@ -484,6 +484,15 @@ class OclawGateway:
 
         return str(maybe_ops_short_intent_system_hint(text=str(msg.text or ""), lang=lang) or "").strip()
 
+    @staticmethod
+    def _group_focus_system_hint(msg: StandardMessage, lang: str) -> str:
+        md = msg.metadata if isinstance(msg.metadata, dict) else {}
+        if not bool(md.get("is_group")):
+            return ""
+        from runtime.orchestration.group_ingest import build_group_focus_instruction
+
+        return str(build_group_focus_instruction(lang=lang) or "").strip()
+
     @staticmethod
     def _tabular_query_system_hint(lang: str) -> str:
         limits = OclawGateway._tabular_limits_from_config()
@@ -1180,6 +1189,9 @@ class OclawGateway:
                 ch_hint = self._channel_file_delivery_system_hint(lang)
                 if ch_hint:
                     sys_prompt = f"{sys_prompt}\n\n{ch_hint}".strip()
+                focus_hint = self._group_focus_system_hint(msg, lang)
+                if focus_hint:
+                    sys_prompt = f"{sys_prompt}\n\n{focus_hint}".strip()
                 if str(manager_specialist or requested_specialist or "").strip().lower() == "ops":
                     intent_hint = self._ops_short_intent_system_hint(msg, lang)
                     if intent_hint:
diff --git a/runtime/orchestration/group_ingest.py b/runtime/orchestration/group_ingest.py
index 82c5f550..5d22da38 100644
--- a/runtime/orchestration/group_ingest.py
+++ b/runtime/orchestration/group_ingest.py
@@ -415,13 +415,20 @@ def should_process_group_inbound(
     return not require_mention
 
 
-def build_group_sender_context(*, metadata: dict[str, Any] | None, external_user_id: str) -> str:
+def build_group_sender_context(
+    *,
+    metadata: dict[str, Any] | None,
+    external_user_id: str,
+    lang: str = "en",
+) -> str:
     meta = metadata if isinstance(metadata, dict) else {}
     raw = meta.get("raw") if isinstance(meta.get("raw"), dict) else {}
     push_name = str(raw.get("pushName") or meta.get("push_name") or meta.get("display_name") or "").strip()
     sender = str(external_user_id or "").strip()
     label = push_name or sender or "unknown"
-    return f"[发言: {label}]"
+    if str(lang or "").strip().lower().startswith("zh"):
+        return f"[发言: {label}]"
+    return f"[Sender: {label}]"
 
 
 def _mention_tokens_for_jids(jids: list[str]) -> list[str]:
@@ -565,6 +572,7 @@ def prepare_group_user_text_for_model(
     tenant_id: str = "",
     account_id: str = "",
     quoted_ctx: str = "",
+    lang: str = "en",
 ) -> str:
     body = str(text or "").strip()
     body = strip_bot_mentions_from_text(text=body, bot_jid=bot_jid, metadata=metadata)
@@ -582,10 +590,11 @@ def prepare_group_user_text_for_model(
         account_id=account_id,
     )
     prefix_parts: list[str] = []
-    if normalize_group_session_scope(session_scope) == "chat":
-        prefix_parts.append(
-            build_group_sender_context(metadata=metadata, external_user_id=external_user_id)
-        )
+    # Always tag the speaker in groups (shared or per-user) so history/quotes cannot 串话.
+    _ = session_scope  # retained for call-site compatibility / future policy forks
+    prefix_parts.append(
+        build_group_sender_context(metadata=metadata, external_user_id=external_user_id, lang=lang)
+    )
     quote = str(quoted_ctx or "").strip()
     if quote:
         prefix_parts.append(quote)
@@ -597,10 +606,15 @@ def prepare_group_user_text_for_model(
 
 def build_group_focus_instruction(*, lang: str = "en") -> str:
     if str(lang or "").strip().lower().startswith("zh"):
-        return "[群聊规则：只回答当前发言人的问题；除非本条消息明确引用或承接前文，否则不要默认继承其他群成员的上下文。]"
+        return (
+            "[群聊规则：只回答当前发言人（见 [发言: …]）的问题；"
+            "除非本条消息明确引用或承接前文，否则不要默认继承其他群成员的上下文；"
+            "若排队合并了多条跟进，按条分别回应并 @ 对应发言人。]"
+        )
     return (
-        "[Group chat rule: answer only the current sender's request. "
-        "Do not assume context from other members unless this message explicitly quotes or references it.]"
+        "[Group chat rule: answer only the current sender (see [Sender: …]). "
+        "Do not assume context from other members unless this message explicitly quotes or references it. "
+        "If several follow-ups were merged while busy, answer each item and @ the matching sender.]"
     )
 
 
diff --git a/runtime/tools/tool_error_hints.py b/runtime/tools/tool_error_hints.py
index d8600742..ad1088b9 100644
--- a/runtime/tools/tool_error_hints.py
+++ b/runtime/tools/tool_error_hints.py
@@ -77,19 +77,29 @@ def enrich_mcp_scope_error(result: dict[str, Any]) -> dict[str, Any]:
     out["error"] = f"insufficient_scope:{scope}" if scope else "insufficient_scope"
     if scope == "sql:query":
         out["hint"] = (
-            "Current netx token lacks sql:query. Prefer aggregateUmeAlarms / queryUmeAlarmsRaw / "
-            "ume_alarm_xlsx_report; ask an admin to grant sql:query only if SQL is required."
+            "Current netx token lacks sql:query. Do not retry sqlQueryUme. "
+            "Prefer aggregateUmeAlarms / queryUmeAlarmsRaw / ume_alarm_xlsx_report; "
+            "ask an admin to grant sql:query only if SQL is truly required."
         )
         out["fallback_tools"] = [
             "mcp__netx__aggregateUmeAlarms",
             "mcp__netx__queryUmeAlarmsRaw",
             "ume_alarm_xlsx_report",
         ]
+        out["user_facing_hint"] = (
+            "SQL query is not enabled for this bot token. "
+            "I will use alarm aggregate/report tools instead, or an admin can grant sql:query."
+        )
     else:
         out["hint"] = (
             f"Current netx token lacks scope {scope or '(unknown)'}. "
-            "Ask an admin to grant it on the netx API token, or use tools that do not need this scope."
+            "Do not retry the same tool; ask an admin to grant it, or use tools that do not need this scope."
         )
+        out["user_facing_hint"] = (
+            f"Permission missing ({scope or 'scope'}). An admin needs to grant this on the netx API token."
+        )
+    out["failure_class"] = "auth"
+    out["retry_forbidden"] = True
     return out
 
 
diff --git a/tests/test_channel_turn_gate.py b/tests/test_channel_turn_gate.py
index 22024ec5..bad06850 100644
--- a/tests/test_channel_turn_gate.py
+++ b/tests/test_channel_turn_gate.py
@@ -48,9 +48,31 @@ def test_merge_channel_pending_jobs_zh_header() -> None:
             {"user_text": "还有告警吗？", "lang": "zh"},
         ]
     )
-    assert "一并回答" in str(merged.get("user_text") or "")
-    assert "1) 光功率？" in str(merged.get("user_text") or "")
-    assert "2) 还有告警吗？" in str(merged.get("user_text") or "")
+    text = str(merged.get("user_text") or "")
+    assert "分别回答" in text
+    assert "1) 光功率？" in text
+    assert "2) 还有告警吗？" in text
+
+
+def test_merge_channel_pending_jobs_keeps_sender_labels() -> None:
+    merged = merge_channel_pending_jobs(
+        [
+            {
+                "user_text": "LOS count?",
+                "lang": "en",
+                "msg_metadata": {"group_sender_label": "Alice"},
+            },
+            {
+                "user_text": "offline NEs?",
+                "lang": "en",
+                "msg_metadata": {"group_sender_label": "Bob"},
+            },
+        ]
+    )
+    text = str(merged.get("user_text") or "")
+    assert "[Alice]" in text
+    assert "[Bob]" in text
+    assert "own sender" in text.lower() or "Answer each" in text
 
 
 def test_isolated_sessions_and_reset() -> None:
diff --git a/tests/test_group_ingest.py b/tests/test_group_ingest.py
index 54ffabb4..92f05a26 100644
--- a/tests/test_group_ingest.py
+++ b/tests/test_group_ingest.py
@@ -359,8 +359,14 @@ def test_build_group_sender_context() -> None:
         metadata={"raw": {"pushName": "Alice"}},
         external_user_id="111@s.whatsapp.net",
     )
-    assert ctx == "[发言: Alice]"
+    assert ctx == "[Sender: Alice]"
     assert "111@s.whatsapp.net" not in ctx
+    zh = build_group_sender_context(
+        metadata={"raw": {"pushName": "Alice"}},
+        external_user_id="111@s.whatsapp.net",
+        lang="zh",
+    )
+    assert zh == "[发言: Alice]"
 
 
 def test_strip_bot_mentions_from_text() -> None:
@@ -385,16 +391,17 @@ def test_normalize_mentioned_users_in_text_uses_nickname() -> None:
 def test_prepare_group_user_text_for_model_user_in_chat() -> None:
     out = prepare_group_user_text_for_model(
         text="@162788605444170 每三分钟提醒@200846277140511 喝水",
-        metadata={"bot_lid": "162788605444170@lid", "bot_push_name": "oliver"},
+        metadata={"bot_lid": "162788605444170@lid", "bot_push_name": "oliver", "raw": {"pushName": "Bob"}},
         mentions=["162788605444170@lid", "200846277140511@lid"],
         bot_jid="8618142387786@s.whatsapp.net",
         session_scope="user_in_chat",
         external_user_id="8618142387786@s.whatsapp.net",
         filtered_mention_jids=["200846277140511@lid"],
         mention_names=["吴华"],
+        lang="zh",
     )
-    assert out == "每三分钟提醒@吴华 喝水"
-    assert "[发言:" not in out
+    assert out.startswith("[发言: Bob]")
+    assert "每三分钟提醒@吴华 喝水" in out
 
 
 def test_prepare_group_user_text_for_model_shared_chat_prefix() -> None:
@@ -405,8 +412,9 @@ def test_prepare_group_user_text_for_model_shared_chat_prefix() -> None:
         bot_jid="999@s.whatsapp.net",
         session_scope="chat",
         external_user_id="111@s.whatsapp.net",
+        lang="en",
     )
-    assert out.startswith("[发言: Alice]")
+    assert out.startswith("[Sender: Alice]")
     assert out.endswith("帮忙")
     assert "@999" not in out
 
@@ -415,6 +423,7 @@ def test_build_group_focus_instruction() -> None:
     en = build_group_focus_instruction()
     zh = build_group_focus_instruction(lang="zh")
     assert "current sender" in en
+    assert "[Sender:" in en or "Sender" in en
     assert "群聊规则" in zh
 
 
@@ -742,8 +751,8 @@ def test_inbound_group_mention_uses_per_user_session_and_sender_prefix(
     assert len(session_ids) == 2
     assert session_ids[0] != session_ids[1]
     assert "[群成员:" not in captured["text"]
-    assert "[发言:" not in captured["text"]
-    assert captured["text"] == "again"
+    assert captured["text"].startswith("[Sender: Bob]")
+    assert captured["text"].endswith("again")
     assert "群聊规则" not in captured["text"]
 
     sid = store.get_or_create_channel_session_v2(
diff --git a/tests/test_oclaw_gateway_trace.py b/tests/test_oclaw_gateway_trace.py
index 54f40d70..c2c553ec 100644
--- a/tests/test_oclaw_gateway_trace.py
+++ b/tests/test_oclaw_gateway_trace.py
@@ -954,3 +954,31 @@ def test_channel_file_delivery_hint_goes_to_system_not_user_message() -> None:
         metadata={},
     )
     assert not OclawGateway._is_channel_delivery_channel(msg_admin)
+
+
+def test_group_focus_system_hint_only_for_groups() -> None:
+    from runtime.types import StandardMessage
+
+    group_msg = StandardMessage(
+        session_id="s1",
+        tenant_id="t1",
+        user_id="u1",
+        role="member",
+        channel="whatsapp",
+        text="@bot alarms",
+        attachments=[],
+        metadata={"is_group": True},
+    )
+    dm = StandardMessage(
+        session_id="s1",
+        tenant_id="t1",
+        user_id="u1",
+        role="member",
+        channel="whatsapp",
+        text="alarms",
+        attachments=[],
+        metadata={"is_group": False},
+    )
+    hint = OclawGateway._group_focus_system_hint(group_msg, "en")
+    assert "current sender" in hint
+    assert OclawGateway._group_focus_system_hint(dm, "en") == ""
diff --git a/tests/test_tool_error_hints.py b/tests/test_tool_error_hints.py
index e37af5a3..463048b7 100644
--- a/tests/test_tool_error_hints.py
+++ b/tests/test_tool_error_hints.py
@@ -33,6 +33,10 @@ def test_enrich_mcp_scope_sql() -> None:
     raw = {"ok": False, "error_code": "mcp_rpc_error_-32001", "error": "insufficient_scope:sql:query"}
     out = enrich_mcp_scope_error(raw)
     assert out["error_code"] == "insufficient_scope"
+    assert out.get("failure_class") == "auth"
+    assert out.get("retry_forbidden") is True
+    assert "aggregateUmeAlarms" in str(out.get("hint") or "")
+    assert "SQL query is not enabled" in str(out.get("user_facing_hint") or "")
     assert out["required_scope"] == "sql:query"
     assert "fallback_tools" in out
     assert "ume_alarm_xlsx_report" in out["fallback_tools"]