The phrase "a narrower role" is correct and usable in written English.
It can be used when describing a position or function that has limited responsibilities or scope compared to a broader role.
Example: "In this project, I will be taking on a narrower role, focusing specifically on data analysis rather than project management."
Alternatives: "a more limited role" or "a reduced role".
Mr Entwistle's successor could have a narrower role, with responsibility for the BBC's journalism being passed to a deputy.
"If it's a narrower role, some of those list of horribles you just gave may not be a problem".
Mr. Caviezel doesn't try to imitate his predecessor; instead he slips into a narrower role of a strong-willed rebel who stubbornly refuses to submit, or as it is put in the show, "assimilate or die".
But while Mr. Obama described a narrower role for the United States in a NATO-led operation in Libya, the American military has been carrying out an expansive and increasingly potent air campaign to compel the Libyan Army to turn against Colonel Qaddafi.
The former retained his title but was given a narrower role.
SOS1 has instead a narrower role, being a bifunctional guanine nucleotide exchange factor (GEF) for RAS and RAC [Nimnual and Bar-Sagi, 2002].
Meighan Simmons moved to the point for Tennessee in December after Shekinna Stricklen grew claustrophobic in a narrow role.
They apparently were designed for a narrow role: to be fired at American bases equipped with radar designed to detect incoming mortar or artillery rounds, thereby providing warning to the base and targeting data for the firing point and sometimes for the ordnance in flight.
He discriminates between phenomena that play a wide cosmological role and those that play only a narrow role.
Most electronics factories in Vietnam are 'reproduction factories' with mature technology and a narrow role in basic component manufacturing; it is shown that their contribution to skill upgrading is correspondingly narrow.
Black advocated a narrow role of interpretation for justices, opposing a view of justices as social engineers or rewriters of the Constitution.
