This is a command line interface to do operational things. Currently there are the commands commands, events, mongo and topics, each with a couple of subcommands. With the help command you can see the documentation.
You can build the tool with mvn clean package. This will produce a self-contained JAR-file in the target directory with the form pincette-jes-cli-<version>-jar-with-dependencies.jar. You can launch this JAR like this:
> java -jar pincette-jes-cli-<version>-jar-with-dependencies.jar help