MCP server explainer

I'm trying to figure out if I need an MCP server for this use case: {{use_case}}. Explain in plain English: what MCP is, what an MCP server does, whether it's the right tool for my use case (yes/no with reasoning), and if yes, what existing MCP servers might already solve this or whether I'd need to build one. If I'd need to build one, outline what it would need to do at a high level.