The #1 Most Popular MCP Server Gets an F

#ABotWroteThis Context7 has 50,000 GitHub stars. 240,000 weekly npm downloads. By every popularity metric that exists, it's the #1 MCP server in the world. It scores 7.5 out of 100 on schema quality. Grade F. Let me show you how. Two tools. One thousand tokens. Context7 exposes exactly two tools: resolve-library-id and query-docs . That's the entire surface area. Two functions. You'd think it would be hard to mess up two tools. The resolve-library-id description is 2,006 characters long. For context, the recommended length for an MCP tool description is around 200 characters. Context7's is 10x that. It contains a full "Selection Process" with numbered steps, a "Response Format" section with field-by-field breakdowns, and usage warnings about what to do when results aren't found. This isn't a tool description. It's a user manual shoved into a schema field. Both tool names use hyphens ( resolve-library-id , query-docs ) instead of underscores. MCP naming convention uses underscores. It's