diff --git a/src/llm/conversation.rs b/src/llm/conversation.rs
index 69e1531..e5b746a 100644
--- a/src/llm/conversation.rs
+++ b/src/llm/conversation.rs
@@ -239,5 +239,6 @@ pub const DEFAULT_SYSTEM_PROMPT: &str = "You are a concise and helpful assistant
     Keep replies practical and natural. \
     Unless the user asks for detail, keep most replies under 120 Chinese characters. \
     \
-    如果需要了解用户的长期记忆或历史对话摘要，使用 read_memories / read_summaries 工具。\
-    如果用户提到重要的个人信息或约定，使用 write_memory 工具记录下来。";
+    可用的核心工具：query_capabilities（查看所有可用工具）、call_capability（按名调用工具）。\
+    可使用 read_memories / write_memory 管理用户长期记忆，read_summaries 查看历史摘要。\
+    调用工具前先用 query_capabilities 确认工具有哪些。";
diff --git a/src/main.rs b/src/main.rs
index 37a986e..0539f3b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -238,28 +238,43 @@ async fn cmd_listen(
             ..Default::default()
         };
 
-        // 构建 LLM tools 列表（skills + 上下文工具）
+        // 仅暴露两个元工具：查询能力 + 调用能力
+        // 具体工具描述通过 query_capabilities 返回
         let mut tools_list: Vec<serde_json::Value> = Vec::new();
 
-        if let Some(ref registry) = skill_registry {
-            for spec in registry.list_specs() {
-                tools_list.push(serde_json::json!({
-                    "type": "function",
-                    "function": {
-                        "name": spec.name,
-                        "description": spec.description,
-                        "parameters": spec.parameters,
-                    }
-                }));
+        // query_capabilities：列出所有可用工具及其说明
+        tools_list.push(serde_json::json!({
+            "type": "function",
+            "function": {
+                "name": "query_capabilities",
+                "description": "列出所有可用工具的详细说明、参数格式和调用示例。在需要了解有哪些工具可用时首先调用此工具。",
+                "parameters": { "type": "object", "properties": {} }
             }
-        }
+        }));
 
-        // 上下文工具（长期记忆 + 摘要）
+        // call_capability：按名称调用任意工具
+        tools_list.push(serde_json::json!({
+            "type": "function",
+            "function": {
+                "name": "call_capability",
+                "description": "按工具名称调用一个已注册的工具。name 为工具名（来自 query_capabilities），prompt 为自然语言需求",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "name": { "type": "string", "description": "工具名称" },
+                        "prompt": { "type": "string", "description": "自然语言需求" }
+                    },
+                    "required": ["name"]
+                }
+            }
+        }));
+
+        // 上下文工具（仍然直接暴露给 LLM）
         tools_list.push(serde_json::json!({
             "type": "function",
             "function": {
                 "name": "read_memories",
-                "description": "读取用户的长期记忆（跨会话持久保存的个人信息、偏好、约定等）",
+                "description": "读取用户的长期记忆（偏好、个人信息、约定）",
                 "parameters": { "type": "object", "properties": {} }
             }
         }));
@@ -267,7 +282,7 @@ async fn cmd_listen(
             "type": "function",
             "function": {
                 "name": "write_memory",
-                "description": "写入一条用户的长期记忆（当用户提到重要偏好、个人信息、约定时调用）",
+                "description": "记录用户的重要信息或偏好",
                 "parameters": {
                     "type": "object",
                     "properties": {
@@ -281,28 +296,11 @@ async fn cmd_listen(
             "type": "function",
             "function": {
                 "name": "read_summaries",
-                "description": "读取历史会话摘要（包括因上下文压缩或空闲超时产生的摘要）",
+                "description": "读取历史会话摘要",
                 "parameters": { "type": "object", "properties": {} }
             }
         }));
 
-        // call_capability 桥接：iPet 兼容，按 skill 名调用
-        tools_list.push(serde_json::json!({
-            "type": "function",
-            "function": {
-                "name": "call_capability",
-                "description": "按名称调用一个 skill（等同于直接使用该 skill 的工具名）。name 参数为 skill 的名称，prompt 为自然语言需求",
-                "parameters": {
-                    "type": "object",
-                    "properties": {
-                        "name": { "type": "string", "description": "要调用的 skill 名称" },
-                        "prompt": { "type": "string", "description": "给该 skill 的自然语言需求" }
-                    },
-                    "required": ["name"]
-                }
-            }
-        }));
-
         cfg.tools = Some(tools_list);
 
         // 创建 Conversation
@@ -372,6 +370,17 @@ async fn cmd_listen(
                         return Ok(memory_store.write_for(&user_id, content).await);
                     }
                     "read_summaries" => return Ok(context::tools::read_summaries(&session).await),
+                    "query_capabilities" => {
+                        if let Some(r) = reg.as_ref() {
+                            return Ok(build_capability_list(r));
+                        }
+                        return Ok("暂无工具".to_string());
+                    }
+                    "get_current_datetime" => {
+                        let now = chrono::Local::now();
+                        return Ok(serde_json::json!({"datetime": now.format("%Y-%m-%d %H:%M:%S").to_string()}).to_string());
+                    }
+                    "manage_memos" => return handle_memos(&args).await,
                     "call_capability" => {
                         let cap_params: serde_json::Value = serde_json::from_str(&args).unwrap_or_default();
                         let cap_name = cap_params.get("name").and_then(|v| v.as_str()).map(|s| s.to_string());
@@ -800,6 +809,55 @@ fn global_skills_dir() -> std::path::PathBuf {
         .join("skills")
 }
 
+fn build_capability_list(reg: &SkillRegistry) -> String {
+    let mut lines = vec!["📋 可用工具:".to_string()];
+    for spec in reg.list_specs() {
+        let risk = if spec.risk_level == tools::skill::RiskLevel::High { " ⚠️需确认" } else { "" };
+        lines.push(format!(
+            "\n🔹 {} {} — {}", spec.name, risk, spec.description
+        ));
+    }
+    lines.join("\n")
+}
+
+async fn handle_memos(args_json: &str) -> Result<String, String> {
+    use std::io::{Read, Write};
+    let params: serde_json::Value = serde_json::from_str(args_json).unwrap_or_default();
+    let action = params.get("action").and_then(|v| v.as_str()).unwrap_or("list");
+    let path = ".data/memos.json";
+    std::fs::create_dir_all(".data").ok();
+
+    let mut data: Vec<serde_json::Value> = if std::path::Path::new(path).exists() {
+        serde_json::from_str(&std::fs::read_to_string(path).unwrap_or_default()).unwrap_or_default()
+    } else {
+        vec![]
+    };
+
+    match action {
+        "add" => {
+            let content = params.get("content").and_then(|v| v.as_str()).unwrap_or("");
+            if content.is_empty() { return Ok(r#"{"error":"请提供 content 参数"}"#.to_string()); }
+            let next_id = data.iter().filter_map(|m| m.get("id").and_then(|v| v.as_i64())).max().unwrap_or(0) + 1;
+            data.push(serde_json::json!({"id": next_id, "content": content, "created_at": chrono::Local::now().format("%Y-%m-%d %H:%M").to_string()}));
+            std::fs::write(path, serde_json::to_string_pretty(&data).unwrap()).ok();
+            Ok(format!("已添加备忘录 #{}", next_id))
+        }
+        "list" => {
+            if data.is_empty() { return Ok("暂无备忘录".to_string()); }
+            Ok(data.iter().map(|m| format!("#{} [{}] {}", m["id"], m.get("created_at").and_then(|v| v.as_str()).unwrap_or("?"), m["content"].as_str().unwrap_or("?"))).collect::<Vec<_>>().join("\n"))
+        }
+        "delete" => {
+            let id = params.get("id").and_then(|v| v.as_i64()).unwrap_or(0);
+            let before = data.len();
+            data.retain(|m| m.get("id").and_then(|v| v.as_i64()) != Some(id));
+            if data.len() == before { return Ok(format!("未找到备忘录 #{}", id)); }
+            std::fs::write(path, serde_json::to_string_pretty(&data).unwrap()).ok();
+            Ok(format!("已删除备忘录 #{}", id))
+        }
+        _ => Ok("未知操作，支持: add, list, delete".to_string())
+    }
+}
+
 async fn cmd_skills(action: SkillsAction) {
     use dialoguer::{MultiSelect, theme::ColorfulTheme};
     use console::Term;