Instrument nouns between Dholuo and Arabic

In Dholuo (a West Nilotic language of Kenya), instrument nouns are formed using ra-...-i (the final -i is dropped after sonorants and semivowels), as in the table below (Tucker 1993:111-112, retranscribed). Both English and Arabic have comparable formations. In English, instrument nouns are occasionally formed with the -er suffix, like agent nouns. In Arabic, instrument nouns are more systematically formed, but with a variety of different patterns, starting with mi-..., or in modern colloquials with a feminine agent noun CaCCaaC-a.

However, taking a look at the cases listed by Tucker, we may note a striking cross-linguistic difference in distribution. In Arabic, all but three of the translated nouns use an instrument noun pattern of some sort, and two of the others use a more general verbal noun pattern; only "ladder" appears completely underived. In English, "peg", "billhook", "pestle", "tongs", "lid" all seem to be underived and simplex, and for several cases with zero-derivation (notably "hoe", "rake", "drill", "sign"), intuition suggests that the verb derives from the noun, the opposite of what we see in Arabic or Dholuo.

This suggests a typological difference in the structure of the lexicon: perhaps some languages "prefer" to mark instrument nouns as such and to form them from corresponding actions, while some prefer simple instrument nouns from which verbs may be formed indicating the corresponding actions. I wonder whether that holds up on a larger sample? What does your language tend to do, dear reader?

cut	toŋ-o	قطع	|	billhook, cutter	ra-tóŋ̂	منجل
slash	bẹt-ọ	مزّق	|	slasher	rạ-bẹ́t-ị̂	منجل طويل
hoe	pur-o	عزق	|	hoe	ra-púr̂	معزق
scratch	gwạr-ọ	خدش	|	forked rake	rạ-gwạ́r̂	مدمّة
see	ŋịy-ọ	رأى	|	mirror	rạ-ŋị́ị̂	مرآة
strain	dhịŋ-ọ	صفّى	|	strainer	rạ-dhị́ŋ̂	مصفاة
pound	yọk-ọ	دق	|	pestle	rạ-yọ́k-ị̂	مدقة
pierce	cwọw-ọ	ثقب	|	piercing instrument	ra-cwọ́p-î	مثقاب
hold	mạk-o	مسك	|	tongs	rạ-mạ́k-ị̂	ممساك
plug up	din-o	سد	|	stopper	ra-dín̂	سدّادة
hang	ŋạw-ọ	علّق	|	peg for hanging	ra-ŋạ́ŵ	علاّقة
cover	um-o	غطّى	|	lid, cover	ra-úm̂	غطاء
show	nyis-o	أظهر	|	sign	ra-nyís-î	علامة
climb	ịdh-ọ	صعد	|	ladder	rạ-ị́dh-ị̂	سلّم