Template::Alloy, which should be a drop in replacement for Template::Tookit, has a configuration option called CALL_CONTEXT that can be set to one of smart (default), item, or list. There are many ways you can change the context you call in, you can set the global CALL_CONTEXT option during new, you can set it locally using a [% CONFIG CALL_CONTEXT => "list" %] inside your template, or you can use the @() and $() context specifiers (as in [% results = @( myobj.mymethod() ) %]).

The following is a table of what is returned in each context copied from the Template::Alloy pod.

       return values      smart context   list context    item context
       -------------      -------------   ------------    ------------
    A   'foo'              'foo'           'foo'         'foo'
    B   undef              undef           undef         undef
    C   (no return value)  undef           []              undef
    D   (7)                7               7             7
    E   (7,8,9)            7,8,9         7,8,9         9
    F   @a = (7)           7               7             1
    G   @a = (7,8,9)       7,8,9         7,8,9         3
    H   ({b=>"c"})         {b=>"c"}        {b=>"c"}      {b=>"c"}
    I   (1)              1             [1]           1
    J   (1,2)          [1,2]       [1,2]       2
    K   7,8,9            7,8,9         [7,8,9]       7,8,9
    L   (undef, "foo")     die "foo"       undef, "foo"  "foo"
    M   wantarray?1:0      1               1             0

Disclaimer: I am the author.