Your MCP server probably has too many tools

I built the first working version of Beacon , Siren's MCP server, in an evening while playing video games. The thing I shipped that night was technically a functioning MCP server, and it was completely unusable. Claude could see the tools. Claude could list the tools. Claude would confidently pick the wrong tool every single time, call it with parameters that didn't match anything real, and then cheerfully lie to the user about what had happened. I'd built a very expensive random number generato