Paritosh - Please make sure that you register the lease agreement. It is around 1.5 % your average annual rent and you could do it yourself. If your doing for the first time, please hire an advocate and get it done. Advocate fee shouldn't be more than 7-10k. This will make you sleep better :-)
Rent agreement is an important document which defines the legally binding relationship between the tenant and the landlord. Usually, a broker is involved in carrying out the initial transaction between the two parties. However, both the parties can also take help of a lawyer to draw the rental agreement.
A rental agreement is a legal document which lays down the conditions on which relationship between the landlord and the tenant is determined. You can read the article here Rent agreement: Points to remember