The blog post discusses lesser-known features of the libcouchbase client library, focusing on the cbc toolset, which provides a variety of commands for interacting with Couchbase clusters. These commands, developed by Trond Norbye, are valuable for diagnostic and debugging purposes, and although not essential for application development, they offer practical utilities such as storing, retrieving, and managing data within a cluster. The blog covers various commands available in libcouchbase's current and preview versions, explaining how to use them for actions like copying files to a cluster, creating and deleting keys, calculating hashes, and obtaining server statistics. It also highlights the importance of command-line arguments for cluster connections and offers solutions for managing connection settings through configuration files and environment variables. The post is updated to reflect the latest version, 3.0, and provides resources for installation and further reading.