Microsoft Unveils MCP Interviewer: An Open-Source Tool for Server Reliability
Microsoft Research has introduced MCP Interviewer, an open-source command-line tool designed to help developers build and maintain servers for the Model Context Protocol (MCP). This tool aims to enhance the reliability and functionality of MCP servers across diverse agentic clients.
MCP Interviewer offers a range of features to ensure server compliance and quality. It checks MCP servers for adherence to provider constraints, helping developers avoid deployment pitfalls. The tool also provides automated inspection and functional testing, along with in-depth reporting. Additionally, MCP Interviewer optionally applies natural language evaluation rubrics via large language models (LLMs) to assess tool usability and functional output.
The tool is designed to catch potential server issues before agents encounter them. It uses large language model agents to create and execute test plans, logging successes, errors, and performance metrics. However, developers should note that large agent tool spaces can lower performance for some models by up to 85% due to overwhelming the LLM's context window. MCP Interviewer outputs human-readable Markdown (and JSON) reports, summarizing constraint violations, statistics, and qualitative assessments.
MCP Interviewer is currently an experimental project and should be manually reviewed. Microsoft Research encourages feedback and contributions to improve the tool. The development of such interviewer tools for server cataloging, including the detection of constraint violations and the creation of reports, can be undertaken by various entities, including research institutions, software development companies, consulting firms, quality assurance teams, IT service providers, and even regulatory bodies.
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