diff --git a/langgraph/src/agent/coder/nodes/tool-executor.ts b/langgraph/src/agent/coder/nodes/tool-executor.ts
index 5339405..b42246a 100644
--- a/langgraph/src/agent/coder/nodes/tool-executor.ts
+++ b/langgraph/src/agent/coder/nodes/tool-executor.ts
@@ -96,7 +96,10 @@ export async function toolExecutorNode(
       return {
         role: "tool" as const,
         tool_call_id: id,
-        content: formatToolError(name, e),
+        content: JSON.stringify({
+          error: formatToolError(name, e),
+          fallback_hint: "沙盒暂时不可用。请告知用户：1) 可以直接分析代码逻辑而无需执行；2) 可稍后重试；3) 可以把代码粘贴到本地环境运行。",
+        }),
       };
     }
   });
diff --git a/langgraph/src/agent/enterprise/nodes/tool-executor.ts b/langgraph/src/agent/enterprise/nodes/tool-executor.ts
index 0c3db2a..793ef00 100644
--- a/langgraph/src/agent/enterprise/nodes/tool-executor.ts
+++ b/langgraph/src/agent/enterprise/nodes/tool-executor.ts
@@ -171,6 +171,18 @@ export async function toolExecutorNode(
             },
             { message: lastAiMessage },
           );
+          if (tickets.length === 0) {
+            statusList.push({ tool: name, status: "empty", message: "未查询到工单" });
+            return {
+              role: "tool" as const,
+              tool_call_id: id,
+              content: JSON.stringify({
+                total: 0,
+                tickets: [],
+                hint: "未查询到工单。请告知用户可以：1) 尝试不同的查询条件；2) 检查权限；3) 确认工单系统是否有数据。",
+              }),
+            };
+          }
           statusList.push({ tool: name, status: "ok" });
           return {
             role: "tool" as const,
@@ -225,7 +237,10 @@ export async function toolExecutorNode(
       return {
         role: "tool" as const,
         tool_call_id: id,
-        content: formatToolError(name, e),
+        content: JSON.stringify({
+          error: formatToolError(name, e),
+          fallback_hint: "工具执行失败。请用中文向用户解释错误原因，并提供替代建议。",
+        }),
       };
     }
   });
diff --git a/langgraph/src/agent/enterprise/tools/soc-client.ts b/langgraph/src/agent/enterprise/tools/soc-client.ts
index 89bb74c..9c47396 100644
--- a/langgraph/src/agent/enterprise/tools/soc-client.ts
+++ b/langgraph/src/agent/enterprise/tools/soc-client.ts
@@ -59,7 +59,7 @@ export async function ticketDetail(
   // If ticketId looks like a ticketNumber (e.g. "TK-2026-296691"), resolve UUID first
   let resolvedId = ticketId;
   if (ticketId.startsWith("TK-")) {
-    const searchUrl = `${base}/api/tickets?ticketNumber=${encodeURIComponent(ticketId)}&pageSize=1`;
+    const searchUrl = `${base}/api/tickets?ticketNumber=${encodeURIComponent(ticketId)}&pageSize=50`;
     const searchResp = await fetch(searchUrl, {
       headers,
       signal: AbortSignal.timeout(15000),
@@ -67,8 +67,9 @@ export async function ticketDetail(
     if (searchResp.ok) {
       const searchData = await searchResp.json();
       const tickets = searchData.tickets ?? [];
-      if (tickets.length > 0 && tickets[0].id) {
-        resolvedId = tickets[0].id;
+      const match = tickets.find((t: Record<string, unknown>) => t.ticketNumber === ticketId);
+      if (match?.id) {
+        resolvedId = String(match.id);
       }
     }
   }
diff --git a/langgraph/src/agent/searcher/nodes/tool-executor.ts b/langgraph/src/agent/searcher/nodes/tool-executor.ts
index 08119c1..89c039c 100644
--- a/langgraph/src/agent/searcher/nodes/tool-executor.ts
+++ b/langgraph/src/agent/searcher/nodes/tool-executor.ts
@@ -68,6 +68,18 @@ export async function toolExecutorNode(
               snippet: r.snippet,
             }));
             knowledgeGraph = data.knowledgeGraph;
+            // Auto-supplement with Jina if results < 3
+            if (results.length < 3) {
+              try {
+                const supplementData = await webSearch(parsed.query + " 详细信息");
+                const supplementResults = supplementData.results.slice(0, 3 - results.length).map((r) => ({
+                  title: r.title ?? "",
+                  url: r.url ?? "",
+                  snippet: (r.description ?? r.content ?? "").slice(0, 200),
+                }));
+                results = [...results, ...supplementResults];
+              } catch { /* supplement search failed silently */ }
+            }
           } catch {
             // google_search failed, fallback to web_search_deep (Jina)
             console.warn(`[fallback] google_search failed, trying web_search_deep`);