Although investing in Mutual Funds, through a agent is hassle free, and you need not to bother much about your documentation process, but beware of the advice of agent, sometime for the sake of earning commission from AMCs they push their products/Mutual Funds to investors, which may not suit to your requirements, or may be will not give returns as you expect.
Look for a reputed unbiased, independent Mutual Fund adviser, who can take care of your investments/documentation also.