Macro calling item

[kionysus]

I've created a user Macro in a template "Template_switch" like such:

{$IFALIAS.1} -> {Template_switch:switch.snmp.ifAlias.1.last()}

I've also tried:
{$IFALIAS.1} -> {:switch.snmp.ifAlias.1.last()}

and:
{$IFALIAS.1} -> {:switch.snmp.ifAlias.1.LASTVALUE}

and:
{$IFALIAS.1} -> {Template_switch : {$IFALIAS.1} ifAdminStatus.1.last()}

I've modified an item inside that template to be:

Item "Template_switch : {$IFALIAS.1} ifAdminStatus.1"
Host: Template_switch
Description: {$IFALIAS.1} ifAdminStatus.1
Key: switch.snmp.ifAdminStatus.1


However, when I go to Latest Data, I still see the following displayed:

{$IFALIAS.1} ifAdminStatus.1

Reading the manual online, it says that user macros are supported in item descriptions. What it doesn't say is are macros/keys supported in user macros or does a user macro require only a text string? Am I missing something?