Visitor status does not automatically make you Canadian tax resident, but tax residency is based on facts: time in Canada, residential ties, family, accommodation, and treaty tie-breakers.
183-day and residential-ties risk
Staying near six months, renting a home, bringing family, or repeatedly extending visitor status can create tax-residency questions. A short visit with no Canadian clients and no Canadian employment is lower risk, but not a blanket exemption.
Employment risk
The immigration rule and tax/employer-compliance rule are separate. Foreign employers may need advice if an employee works from Canada long enough to create payroll, permanent-establishment, or provincial issues.