server: only parse tool calls if tools are provided (#5771)

* server: only parse tool calls if tools are provided

* still set `resp.Message.Content`

server/routes.go

@@ -1385,10 +1385,13 @@ func (s *Server) ChatHandler(c *gin.Context) {
 		}
 
 		resp.Message.Content = sb.String()
+
+		if len(req.Tools) > 0 {
 			if toolCalls, ok := m.parseToolCalls(sb.String()); ok {
 				resp.Message.ToolCalls = toolCalls
 				resp.Message.Content = ""
 			}
+		}
 
 		c.JSON(http.StatusOK, resp)
 		return