diff --git a/frontend/src/components/Input-field.vue b/frontend/src/components/Input-field.vue
index 8999914f0..22b1740f0 100644
--- a/frontend/src/components/Input-field.vue
+++ b/frontend/src/components/Input-field.vue
@@ -591,6 +591,25 @@ const handleGoToAgentSettings = () => {
   }
 }
 
+// 获取 Agent 不就绪的原因
+const getAgentNotReadyReasons = (): string[] => {
+  const reasons: string[] = []
+  const config = settingsStore.agentConfig || { allowedTools: [] }
+  const models = settingsStore.conversationModels || { summaryModelId: '', rerankModelId: '' }
+  
+  if (!config.allowedTools || config.allowedTools.length === 0) {
+    reasons.push(t('input.agentMissingAllowedTools'))
+  }
+  if (!models.summaryModelId || models.summaryModelId.trim() === '') {
+    reasons.push(t('input.agentMissingSummaryModel'))
+  }
+  if (!models.rerankModelId || models.rerankModelId.trim() === '') {
+    reasons.push(t('input.agentMissingRerankModel'))
+  }
+  
+  return reasons
+}
+
 const toggleAgentMode = () => {
   // 如果要启用 Agent，先检查是否就绪
   // 注意：isAgentReady 是从 store 中计算的，需要确保 store 中的配置是最新的
@@ -598,16 +617,19 @@ const toggleAgentMode = () => {
     // 尝试启用 Agent，先检查是否就绪
     const agentReady = settingsStore.isAgentReady
     if (!agentReady) {
+      const reasons = getAgentNotReadyReasons()
+      const reasonsText = reasons.join('、')
+      
       // 创建带跳转链接的自定义消息
-      const messageContent = h('div', { style: 'display: flex; align-items: center; gap: 8px; flex-wrap: wrap;' }, [
-        h('span', { style: 'flex: 1; min-width: 0;' }, t('input.messages.agentNotReadyDetail')),
+      const messageContent = h('div', { style: 'display: flex; flex-direction: column; gap: 8px; max-width: 320px;' }, [
+        h('span', { style: 'color: #333; line-height: 1.5;' }, t('input.messages.agentNotReadyDetail', { reasons: reasonsText })),
         h('a', {
           href: '#',
           onClick: (e: Event) => {
             e.preventDefault();
             handleGoToAgentSettings();
           },
-          style: 'color: #07C05F; text-decoration: none; font-weight: 500; cursor: pointer; white-space: nowrap; flex-shrink: 0;',
+          style: 'color: #07C05F; text-decoration: none; font-weight: 500; cursor: pointer; align-self: flex-start;',
           onMouseenter: (e: Event) => {
             (e.target as HTMLElement).style.textDecoration = 'underline';
           },
diff --git a/frontend/src/i18n/locales/en-US.ts b/frontend/src/i18n/locales/en-US.ts
index a08549860..0ef81d921 100644
--- a/frontend/src/i18n/locales/en-US.ts
+++ b/frontend/src/i18n/locales/en-US.ts
@@ -642,7 +642,10 @@ export default {
     normalModeDesc: 'Knowledge base RAG Q&A',
     agentModeDesc: 'ReAct reasoning framework with multi-step thinking',
     agentNotReadyTooltip: 'Agent is not ready. Please finish configuration first.',
-    agentNotReadyDetail: 'Agent is not ready. Please complete the agent configuration in settings (thinking model, rerank model, and allowed tools).',
+    agentNotReadyDetail: 'Agent is not ready. Please configure the following: {reasons}',
+    agentMissingAllowedTools: 'Allowed tools',
+    agentMissingSummaryModel: 'Chat Model (Summary Model)',
+    agentMissingRerankModel: 'Rerank Model',
     goToSettings: 'Go to settings →',
     webSearch: {
       toggleOn: 'Enable Web Search',
@@ -666,7 +669,10 @@ export default {
       agentSwitchedOff: 'Switched to Normal Mode',
       agentEnabled: 'Agent Mode enabled',
       agentDisabled: 'Agent Mode disabled',
-      agentNotReadyDetail: 'Agent is not ready. Please complete the agent configuration in settings (thinking model, rerank model, and allowed tools).',
+      agentNotReadyDetail: 'Agent is not ready. Please configure the following: {reasons}',
+      agentMissingAllowedTools: 'Allowed tools',
+      agentMissingSummaryModel: 'Chat Model (Summary Model)',
+      agentMissingRerankModel: 'Rerank Model',
       webSearchNotConfigured: 'Web search engine is not configured. Please configure a provider and credentials in settings.',
       webSearchEnabled: 'Web search enabled',
       webSearchDisabled: 'Web search disabled',
@@ -1311,7 +1317,8 @@ export default {
       missingThinkingModel: 'Thinking model',
       missingRerankModel: 'Rerank model',
       missingAllowedTools: 'Allowed tools',
-      pleaseConfigure: 'Please configure {items}'
+      pleaseConfigure: 'Please configure {items}',
+      goConfigureModels: 'Configure models →'
     },
     maxIterations: {
       label: 'Max Iterations',
diff --git a/frontend/src/i18n/locales/ru-RU.ts b/frontend/src/i18n/locales/ru-RU.ts
index 69f652301..7c72b534a 100644
--- a/frontend/src/i18n/locales/ru-RU.ts
+++ b/frontend/src/i18n/locales/ru-RU.ts
@@ -785,7 +785,7 @@ export default {
     uninitializedBanner: 'Некоторые базы знаний не инициализированы. Сначала настройте модели в разделе настроек, чтобы добавлять документы.',
     empty: {
       title: 'Базы знаний отсутствуют',
-      description: 'Нажмите «Создать базу знаний» в правом верхнем углу, чтобы добавить первую базу.'
+      description: 'Нажмите «Создать базу знаний» в левом быстром действии, чтобы добавить первую базу.'
     },
     delete: {
       confirmTitle: 'Подтверждение удаления',
@@ -1177,7 +1177,8 @@ export default {
       missingThinkingModel: 'модель мышления',
       missingRerankModel: 'модель ранжирования',
       missingAllowedTools: 'разрешённые инструменты',
-      pleaseConfigure: 'Пожалуйста, настройте: {items}'
+      pleaseConfigure: 'Пожалуйста, настройте: {items}',
+      goConfigureModels: 'Перейти к настройке моделей →'
     },
     maxIterations: {
       label: 'Макс. число итераций',
@@ -1512,7 +1513,10 @@ export default {
     normalModeDesc: 'RAG-вопросы и ответы по базе знаний',
     agentModeDesc: 'Шаблон рассуждений ReAct, многошаговое мышление',
     agentNotReadyTooltip: 'Agent не готов. Пожалуйста, завершите настройку.',
-    agentNotReadyDetail: 'Agent не готов. Сначала завершите настройку агента в параметрах (модель мышления, модель rerank и разрешённые инструменты).',
+    agentNotReadyDetail: 'Agent не готов. Пожалуйста, настройте следующее: {reasons}',
+    agentMissingAllowedTools: 'Разрешённые инструменты',
+    agentMissingSummaryModel: 'Модель беседы (Summary Model)',
+    agentMissingRerankModel: 'Модель переранжирования (Rerank Model)',
     goToSettings: 'Перейти к настройкам →',
     webSearch: {
       toggleOn: 'Включить веб-поиск',
@@ -1536,7 +1540,10 @@ export default {
       agentSwitchedOff: 'Переключено в обычный режим',
       agentEnabled: 'Agent режим включён',
       agentDisabled: 'Agent режим отключён',
-      agentNotReadyDetail: 'Agent не готов. Сначала завершите настройку агента в параметрах (модель мышления, модель rerank и разрешённые инструменты).',
+      agentNotReadyDetail: 'Agent не готов. Пожалуйста, настройте следующее: {reasons}',
+      agentMissingAllowedTools: 'Разрешённые инструменты',
+      agentMissingSummaryModel: 'Модель беседы (Summary Model)',
+      agentMissingRerankModel: 'Модель переранжирования (Rerank Model)',
       webSearchNotConfigured: 'Веб-поиск не настроен. Сначала выберите провайдера и настройте ключи в разделе настроек.',
       webSearchEnabled: 'Веб-поиск включён',
       webSearchDisabled: 'Веб-поиск выключен',
diff --git a/frontend/src/i18n/locales/zh-CN.ts b/frontend/src/i18n/locales/zh-CN.ts
index ac18951e1..e119c2cb1 100644
--- a/frontend/src/i18n/locales/zh-CN.ts
+++ b/frontend/src/i18n/locales/zh-CN.ts
@@ -1010,7 +1010,7 @@ export default {
       "部分知识库尚未初始化，需要先在设置中配置模型信息才能添加知识文档",
     empty: {
       title: "暂无知识库",
-      description: "点击右上角“新建知识库”按钮创建第一个知识库",
+      description: "点击左侧快捷操作“新建知识库”按钮创建第一个知识库",
     },
     delete: {
       confirmTitle: "删除确认",
@@ -1162,7 +1162,7 @@ export default {
       title: "模型配置",
       description: "为知识库选择合适的 AI 模型",
       llmLabel: "LLM 大语言模型",
-      llmDesc: "用于总结和摘要的大语言模型（可选）",
+      llmDesc: "用于总结和摘要的大语言模型",
       llmPlaceholder: "请选择 LLM 模型（可选）",
       embeddingLabel: "Embedding 嵌入模型",
       embeddingDesc: "用于文本向量化的嵌入模型",
@@ -1267,7 +1267,10 @@ export default {
     agentModeDesc: "ReAct 推理框架，多步思考",
     agentNotReadyTooltip: "Agent 未就绪，请先在设置中完成配置",
     agentNotReadyDetail:
-      "Agent 未就绪，请先在设置中完成 Agent 配置（思考模型、Rerank 模型和允许的工具）",
+      "Agent 未就绪，需要配置以下内容：{reasons}",
+    agentMissingAllowedTools: "允许的工具",
+    agentMissingSummaryModel: "对话模型（Summary Model）",
+    agentMissingRerankModel: "重排模型（Rerank Model）",
     goToSettings: "前往设置 →",
     webSearch: {
       toggleOn: "开启网络搜索",
@@ -1292,7 +1295,7 @@ export default {
       agentEnabled: "Agent 模式已启用",
       agentDisabled: "Agent 模式已禁用",
       agentNotReadyDetail:
-        "Agent 未就绪，请先在设置中完成 Agent 配置（思考模型、Rerank 模型和允许的工具）",
+        "Agent 未就绪，需要配置以下内容：{reasons}",
       webSearchNotConfigured:
         "未配置网络搜索引擎，请先在设置中完成搜索引擎选择与接口配置。",
       webSearchEnabled: "网络搜索已开启",
@@ -1313,9 +1316,12 @@ export default {
       notReady: "未就绪",
       hint: "配置完成后，Agent 状态将自动变为“可用”，此时可在对话界面开启 Agent 模式",
       missingThinkingModel: "思考模型",
+      missingSummaryModel: "对话模型（Summary Model）",
       missingRerankModel: "Rerank 模型",
       missingAllowedTools: "允许的工具",
       pleaseConfigure: "请配置{items}",
+      goToConfig: "前往配置对话模型",
+      goConfigureModels: "前往配置模型 →",
     },
     maxIterations: {
       label: "最大迭代次数",
diff --git a/frontend/src/stores/settings.ts b/frontend/src/stores/settings.ts
index 5e791bfe0..52c945924 100644
--- a/frontend/src/stores/settings.ts
+++ b/frontend/src/stores/settings.ts
@@ -65,7 +65,7 @@ const defaultSettings: Settings = {
   agentConfig: {
     maxIterations: 5,
     temperature: 0.7,
-    allowedTools: ["knowledge_search", "multi_kb_search", "list_knowledge_bases"],
+    allowedTools: [],  // 默认为空，需要通过 API 从后端加载
     system_prompt_web_enabled: "",
     system_prompt_web_disabled: "",
     use_custom_system_prompt: false
@@ -99,12 +99,15 @@ export const useSettingsStore = defineStore("settings", {
     isAgentEnabled: (state) => state.settings.isAgentEnabled || false,
     
     // Agent 是否就绪（配置完整）
+    // 需要满足：1) 配置了允许的工具 2) 设置了对话模型 3) 设置了重排模型
     isAgentReady: (state) => {
       const config = state.settings.agentConfig || defaultSettings.agentConfig
       const models = state.settings.conversationModels || defaultSettings.conversationModels
-      return config.allowedTools.length > 0 &&
-             models.summaryModelId !== '' &&
-             models.rerankModelId !== ''
+      return Boolean(
+        config.allowedTools && config.allowedTools.length > 0 &&
+        models.summaryModelId && models.summaryModelId.trim() !== '' &&
+        models.rerankModelId && models.rerankModelId.trim() !== ''
+      )
     },
     
     // 获取 Agent 配置
diff --git a/frontend/src/views/settings/AgentSettings.vue b/frontend/src/views/settings/AgentSettings.vue
index 8ee10b403..b80d1ae2d 100644
--- a/frontend/src/views/settings/AgentSettings.vue
+++ b/frontend/src/views/settings/AgentSettings.vue
@@ -33,6 +33,9 @@
           </div>
           <span v-if="!isAgentReady" class="status-hint">
             {{ agentStatusMessage }}
+            <t-link v-if="needsModelConfig" @click="handleGoToModelSettings" theme="primary">
+              {{ $t('agentSettings.status.goConfigureModels') }}
+            </t-link>
           </span>
           <p v-if="!isAgentReady" class="status-tip">
             <t-icon name="info-circle" class="tip-icon" />
@@ -302,7 +305,7 @@
     </t-tabs>
     </div>
 
-    <div v-else-if="activeSection === 'models'" class="section-block">
+    <div v-else-if="activeSection === 'models'" class="section-block" data-conversation-section="models">
       <div class="section-header">
         <h2>{{ $t('conversationSettings.menus.models') }}</h2>
         <p class="section-description">{{ $t('conversationSettings.models.description') }}</p>
@@ -808,7 +811,13 @@ const saveConversationConfig = async (partial: Partial<ConversationConfig>, toas
 
 // 计算 Agent 是否就绪
 const isAgentReady = computed(() => {
-  return localAllowedTools.value.length > 0
+  return (
+    localAllowedTools.value.length > 0 &&
+    localSummaryModelId.value &&
+    localSummaryModelId.value.trim() !== '' &&
+    localConversationRerankModelId.value &&
+    localConversationRerankModelId.value.trim() !== ''
+  )
 })
 
 const buildAgentConfigPayload = (overrides: Partial<AgentConfig> = {}): AgentConfig => ({
@@ -823,6 +832,14 @@ const buildAgentConfigPayload = (overrides: Partial<AgentConfig> = {}): AgentCon
   ...overrides,
 })
 
+// 是否缺少模型配置
+const needsModelConfig = computed(() => {
+  return (
+    (!localSummaryModelId.value || localSummaryModelId.value.trim() === '') ||
+    (!localConversationRerankModelId.value || localConversationRerankModelId.value.trim() === '')
+  )
+})
+
 // Agent 状态提示消息
 const agentStatusMessage = computed(() => {
   const missing: string[] = []
@@ -831,6 +848,14 @@ const agentStatusMessage = computed(() => {
     missing.push(t('agentSettings.status.missingAllowedTools'))
   }
   
+  if (!localSummaryModelId.value || localSummaryModelId.value.trim() === '') {
+    missing.push(t('agentSettings.status.missingSummaryModel'))
+  }
+  
+  if (!localConversationRerankModelId.value || localConversationRerankModelId.value.trim() === '') {
+    missing.push(t('agentSettings.status.missingRerankModel'))
+  }
+  
   if (missing.length === 0) {
     return ''
   }
@@ -838,6 +863,25 @@ const agentStatusMessage = computed(() => {
   return t('agentSettings.status.pleaseConfigure', { items: missing.join('、') })
 })
 
+// 跳转到模型配置
+const handleGoToModelSettings = () => {
+  router.push('/platform/settings')
+
+  setTimeout(() => {
+    const event = new CustomEvent('settings-nav', {
+      detail: { section: 'agent', subsection: 'models' }
+    })
+    window.dispatchEvent(event)
+
+    setTimeout(() => {
+      const sectionEl = document.querySelector('[data-conversation-section="models"]')
+      if (sectionEl) {
+        sectionEl.scrollIntoView({ behavior: 'smooth', block: 'start' })
+      }
+    }, 150)
+  }, 100)
+}
+
 // 模型列表状态
 const chatModels = ref<ModelConfig[]>([])
 const rerankModels = ref<ModelConfig[]>([])
diff --git a/internal/agent/const.go b/internal/agent/const.go
index 4462ce2ca..120b5000d 100644
--- a/internal/agent/const.go
+++ b/internal/agent/const.go
@@ -4,4 +4,5 @@ const (
 	DefaultAgentTemperature       = 0.7
 	DefaultAgentMaxIterations     = 20
 	DefaultAgentReflectionEnabled = false
+	DefaultUseCustomSystemPrompt  = false
 )
diff --git a/internal/application/service/session.go b/internal/application/service/session.go
index 4073e07a0..302ad4531 100644
--- a/internal/application/service/session.go
+++ b/internal/application/service/session.go
@@ -7,6 +7,8 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/Tencent/WeKnora/internal/agent"
+	"github.com/Tencent/WeKnora/internal/agent/tools"
 	chatpipline "github.com/Tencent/WeKnora/internal/application/service/chat_pipline"
 	llmcontext "github.com/Tencent/WeKnora/internal/application/service/llmcontext"
 	"github.com/Tencent/WeKnora/internal/config"
@@ -858,15 +860,22 @@ func (s *sessionService) AgentQA(ctx context.Context, session *types.Session, qu
 	tenantInfo := ctx.Value(types.TenantInfoContextKey).(*types.Tenant)
 
 	// Check if agent is enabled at session level
-	if session.AgentConfig == nil || !session.AgentConfig.AgentModeEnabled {
-		logger.Warnf(ctx, "Agent not enabled for session: %s", sessionID)
-		return errors.New("agent not enabled for this session")
+	if session.AgentConfig == nil {
+		logger.Warnf(ctx, "Agent config not found for session: %s", sessionID)
+		return errors.New("agent config not found for session")
 	}
 
 	// Check if tenant has agent configuration
 	if tenantInfo.AgentConfig == nil {
-		logger.Warnf(ctx, "Tenant %d has no agent configuration", tenantInfo.ID)
-		return errors.New("tenant has no agent configuration")
+		tenantInfo.AgentConfig = &types.AgentConfig{
+			MaxIterations:           agent.DefaultAgentMaxIterations,
+			ReflectionEnabled:       agent.DefaultAgentReflectionEnabled,
+			AllowedTools:            tools.DefaultAllowedTools(),
+			Temperature:             agent.DefaultAgentTemperature,
+			SystemPromptWebEnabled:  agent.ProgressiveRAGSystemPromptWithWeb,
+			SystemPromptWebDisabled: agent.ProgressiveRAGSystemPromptWithoutWeb,
+			UseCustomSystemPrompt:   agent.DefaultUseCustomSystemPrompt,
+		}
 	}
 
 	// Create runtime AgentConfig by merging session and tenant configs