A useful proposal should name the spaces being cleaned, the tasks performed in each space, and how often the work occurs. It should also state who supplies liners, paper goods, soap, and other consumables. If a task depends on restaurant employees moving equipment or clearing counters, that condition should be written down.
Ask how the provider handles keys, alarm codes, missed access, spills, breakage, and requests outside the normal scope. Product compatibility matters as well. Natural stone, stainless steel, coated flooring, grout, and painted surfaces can be damaged by the wrong chemistry or abrasive tools. A responsible plan accounts for the actual finish rather than treating every hard surface alike.
Price should be compared against scope and frequency, not as a single unexplained figure. A low proposal may omit periodic floor work, restroom restocking, under-furniture cleaning, or detail rotation. A clear proposal lets you compare equivalent work and decide whether the schedule matches your standards.