Calling Tools from the UI Panel in Blender

In most cases, Tools are easiest to activate by clicking on the buttons in the Toolbar (T-Panel). However, when developing an add-on with a custom UI, it may be convenient to transfer the call to the necessary tools to buttons in the user panel.

Read more: https://b3d.interplanety.org/en/calling-tools-from-the-ui-panel-in-blender/