The skill-based approach has been a game changer for me. Instead of wrestling with MCP server configs, I just write a small markdown file describing the CLI tool and its common use cases. The agent loads it on demand when it detects the tool is relevant. Much simpler than maintaining a running process, and the documentation lives right next to my code rather than in some separate server config. The composability argument is what really sold me - piping through jq, chaining commands, redirecting to files... that's stuff I do daily and never have to think about.