Add parameter description for custom python tools within the script

Question

I have developed a python toolbox (.pyt) with a couple of scripts as individual tools. I would like to develop Help or tool descriptions for each of the tools, so that when a user clicks on any parameter on the tools, the right side of the tool window gives out a description/explanation of the parameter just like a default ArcGIS tool displays (shown in the picture  below).

How can I achieve this same functionality in my custom toolbox scripts? I know how to do it through ArcCatalog, but I want to achieve this within the script itself.

Thanks

deleted-user-kdRWG0FmLYqo · Answer

Thanks so much!!

SanghongYoo1 · Answer

In ArcCatlog, to add a help description for each parameter, you have to edit the metadata.

* Select the tool you want to add descriptions in ArcCatalog and switch to Description then click Edit.

* Click a parameter in Syntax under Item Description and type the description in the Dialog Explanation box.
* Save.

deleted-user-kdRWG0FmLYqo · Answer

Did anyone ever get an answer?  I too would love to add help to my toolbox but am confused.  And have no idea how to do it even through catalog.