feat: invoke tool in hrp server

server/tool.go

@@ -0,0 +1,34 @@
+package server
+
+import (
+	"errors"
+
+	"github.com/gin-gonic/gin"
+)
+
+type ToolRequest struct {
+	ServerName string                 `json:"server_name"`
+	ToolName   string                 `json:"tool_name"`
+	Args       map[string]interface{} `json:"args"`
+}
+
+func (r *Router) invokeToolHandler(c *gin.Context) {
+	if r.mcpHub == nil {
+		RenderError(c, errors.New("mcp hub not initialized"))
+		return
+	}
+
+	var req ToolRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		RenderError(c, err)
+		return
+	}
+
+	result, err := r.mcpHub.InvokeTool(c.Request.Context(),
+		req.ServerName, req.ToolName, req.Args)
+	if err != nil {
+		RenderError(c, err)
+		return
+	}
+	RenderSuccess(c, result)
+}