Implementing a Secure MCP Server
An MCP server often starts with a seemingly simple requirement: an AI host should find and summarise tickets about a topic. Once current domain data enters a model context, the endpoint is no longer the central question. What matters is which data becomes visible, under whose permissions it is searched, and which actions the server is allowed to expose at all. This question arose while…
The article discusses the implementation of a secure MCP server for a private development project called Lutions. The key focus is on creating a read-only MCP server with a limited number of tools to prevent unauthorized access and misuse. The server's primary function is to search and retrieve visible tickets, providing bounded context or performing permitted domain operations without directly answering user questions.
The six read-only tools were chosen to reduce uncertainties and minimize the server's impact on the application's workflow, ownership, priority, or external effects. The article also highlights the importance of tool specifications, as they serve as a security-relevant, model-controlled interface, and help align tool lists with actual permission contexts.
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