Automation Trumps Tools
While I encourage the creation of tools to make sysadmins tasks easier, the creation of systems that eliminate tasks is much more important. While automating our tasks often involves creating tools, writing tools does not automate our work.
There's a difference. -- Tom Limoncelli
There can be conflicts sometimes between the admins who are used to using tools and not automation. If they keep using their old process, they will confuse the automation. It's important to keep sysadmins informed about changes to the automation if they're not making them on their own. Check out Tom's full post for further detail and insight.