[Submitted to the original trac issue database at 11.13am, Monday, 8th October 2012]
Whilst it's "less" of the box it'd be more normal to think of "fewer" tools.
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[Added to the original trac issue at 2.24pm, Tuesday, 9th October 2012]
-1: unless you include the word 'tools', I think 'less' is better.
[Added to the original trac issue at 4.45pm, Friday, 24th March 2017]
("Show less" is a fairly standard UI phrase no matter the grammar)
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