Beyond the terms of the tenancy agreement, the tenant has other obligations. These can be summarised (not exhaustively) here:

Give honest and truthful statements during the tenancy application process.
Pay a reasonable (market) rent.
Pay the rent, the bills, and service charges as and when they are due.
Treat the landlord's property, furniture and fittings with respect and care.
Report defects to the landlord immediately they become apparent or as soon as is reasonably practical in the circumstances, and not to permit waste (damage).
Ask for consent to keep pets unless already approved by the landlord.
Follow the rules on not smoking.
Not behave in an anti-social way, particularly around neighbours.
Take reasonable responsibility for the household and visitors to the property.
Not bring into complete residential occupation other residents without informing the landlord.
Not leave the accommodation unoccupied for long periods without informing the landlord.
Give the notice to quit in writing should the tenant wish to bring the tenancy to an end outside of the fixed term and end the tenancy properly.
Not to use the security deposit instead of rent.
Insure their possessions.
To permit the agent access when lawfully requested.

Tenant Obligations