Tools can be easily renamed from the Manage page of your project.
Open the Projects link from the top menu of EHQ and click on your specific project from the drop-down menu.
This will display the Manage page.
Here, you can see all the tools for the project displayed and you can rename them.
You can also change the order in which these tools are displayed by dragging and dropping. Read our article on Order of tools on the project page.