I've seen both agencies & independents do this on the US side of the border and see absolutely no reason why Montreal agencies cannot be held to the same standard.
Certify the following both on your website and over the phone for your ladies:
I cannot tell you how many times I've seen a woman advertised at age 21 to find out that she is 30 (usually the escort thinks it is pretty funny too). There is no excuse to lie about height IMHO and yet I often see them off 3 or 4 inches. Finally, while weight can be tricky as we all might gain 5 or 10 pounds depending on season, etc. - I do not see how you can advertise a girl at 110 pounds and she shows up and you estimate her weight nearer to 135.
A beautiful woman who provides great service will get business regardless of her “credentials” but I think accurately depicting all your ladies gives your agency more credibility.
Just one man's opinion....