Objective Structured Teaching Exercises (OSTEs) are used to evaluate feedback skills. OSTEs are simulated teaching scenarios using standardized learners and trained facilitators to deliver immediate feedback to participants. As per researchers' limited knowledge, there is no published assessment tool to assess the feedback skills using OSTE in Pakistan. Therefore, appropriate consideration is required to develop an assessment tool. In the developed tool comprising of 10 criteria, each criterion has been evaluated by using five marks holistic rubric. The rubric has been adopted from University of Colorado at Denver. Content Validity Index (CVI) of the tool was 0.87 including 0.84 on clarity and 0.91 on relevance. As far as the feasibility is concerned, it is presumed that no cost will be required (either financial or time cost) to use this particular tool. The tool may impose an impact on students' learning, as well as promote learning of curricular objectives and goals in multiple ways. Since, the tool designed is for providing constructive, efficient and timely feedback, it will enhance the feedback skills of the masters' students as well as the faculty.