What a written scope should include
A real scope names every task involved in the job, states a schedule with a realistic start and finish, and spells out what is included in the price versus what is an allowance you choose separately. If a contractor will not put that in writing, they are asking you to trust a memory instead of a document, and that is a fair reason to keep looking elsewhere.
Ask who pulls the permit for the work, and confirm the answer matches who is actually doing the roof. A permit pulled under a different name than the crew standing on your roof is a sign the arrangement is more complicated than it should be.
Signs worth a second look
A contractor who shows up unprompted right after a storm, before you have called anyone, and pressures you to sign the same day is worth extra caution, even if the pitch sounds reasonable. Legitimate storm response work exists, but urgency should come from you deciding you need a roof looked at, not from someone else's sales schedule.
Ask how long the company has actually been doing roofing in your area specifically, since a crew that follows storms from region to region may not be around if a warranty issue comes up two years later on down the line.
Getting more than one opinion
It is reasonable to get a second inspection, especially on anything beyond a small repair. Two honest inspections of the same roof should mostly agree on what they find, even if the recommended fix differs slightly between them. If two inspections come back wildly different in what they claim is wrong, that is worth asking harder questions about rather than just picking the cheaper number offered.
What to expect from us specifically
We give you the same written scope and photo documentation whether the job is a single shingle repair or a full replacement, and we are still in Plano handling roofs long after any one storm has passed through. If a repair we did needs a second look years later, we are the same crew you can call back to look at it.