精简项目：只保留 docker_logs + health + info 三个工具

- 移除 database/middleware 等复杂模块，先聚焦核心功能
- docker_logs：封装 docker logs --tail N <container>
- 修复 go.mod 版本为 1.24 匹配 Docker 构建镜像
- Dockerfile 改用 alpine + docker-cli，避免 scratch 无 shell 问题
- docker-compose.yml 简化为单服务定义

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/tool/system.go

@@ -13,35 +13,33 @@ import (
 
 var StartTime = time.Now()
 
-// SystemTool 提供 health 和 info 两个基础工具。
-type SystemTool struct {
-	version   string
-	registry  HealthChecker
-}
-
 // HealthChecker 用于 system 工具检查其他工具的连通性。
 type HealthChecker interface {
 	HealthCheckAll(ctx context.Context) map[string]error
 }
 
+type SystemTool struct {
+	version  string
+	registry HealthChecker
+}
+
 func NewSystemTool(version string, reg HealthChecker) *SystemTool {
 	return &SystemTool{version: version, registry: reg}
 }
 
 func (s *SystemTool) Name() string        { return "system" }
-func (s *SystemTool) Description() string { return "系统健康检查和信息查询" }
-
+func (s *SystemTool) Description() string { return "服务健康检查和信息查询" }
 func (s *SystemTool) Initialize(_ context.Context) error { return nil }
 func (s *SystemTool) Shutdown(_ context.Context) error   { return nil }
 func (s *SystemTool) HealthCheck(_ context.Context) error { return nil }
 
 func (s *SystemTool) Register(mcpServer *server.MCPServer) error {
 	mcpServer.AddTool(mcp.NewTool("health",
-		mcp.WithDescription("服务健康检查：运行时间、内存使用、连接状态"),
+		mcp.WithDescription("服务健康检查：运行时间、内存、连接状态"),
 	), s.handleHealth)
 
 	mcpServer.AddTool(mcp.NewTool("info",
-		mcp.WithDescription("服务信息：版本号、已配置的数据库、已加载的工具"),
+		mcp.WithDescription("服务信息：版本号、Go 版本、已加载工具"),
 	), s.handleInfo)
 
 	return nil
@@ -52,11 +50,10 @@ func (s *SystemTool) handleHealth(ctx context.Context, _ mcp.CallToolRequest) (*
 	runtime.ReadMemStats(&m)
 
 	result := map[string]any{
-		"status":        "ok",
-		"uptime":        time.Since(StartTime).String(),
-		"goroutines":    runtime.NumGoroutine(),
-		"heap_mb":       float64(m.HeapAlloc) / 1024 / 1024,
-		"gc_cycles":     m.NumGC,
+		"status":     "ok",
+		"uptime":     time.Since(StartTime).String(),
+		"goroutines": runtime.NumGoroutine(),
+		"heap_mb":    float64(m.HeapAlloc) / 1024 / 1024,
 	}
 
 	if s.registry != nil {
@@ -69,14 +66,13 @@ func (s *SystemTool) handleHealth(ctx context.Context, _ mcp.CallToolRequest) (*
 
 func (s *SystemTool) handleInfo(ctx context.Context, _ mcp.CallToolRequest) (*mcp.CallToolResult, error) {
 	result := map[string]any{
-		"version":     s.version,
-		"go_version":  runtime.Version(),
-		"os":          runtime.GOOS,
-		"arch":        runtime.GOARCH,
-		"cpus":        runtime.NumCPU(),
-		"start_time":  StartTime.Format(time.RFC3339),
+		"version":    s.version,
+		"go_version": runtime.Version(),
+		"os":         runtime.GOOS,
+		"arch":       runtime.GOARCH,
+		"cpus":       runtime.NumCPU(),
+		"start_time": StartTime.Format(time.RFC3339),
 	}
-
 	data, _ := json.MarshalIndent(result, "", "  ")
 	return mcp.NewToolResultText(fmt.Sprintf("```json\n%s\n```", string(data))), nil
 }