I am finally (after several rewrites and workshoppings and more rewrites) ready to start querying a novel. I am concurrently spending time in a wheelchair due to a heart problem that may or may not be permanent. I have gotten used to the looks and the people talking over my head, and what people might think about my choice of wheel-friendly clothing won’t bother me when I attend a conference next month. I won’t be pitching, although I am curious about whether showing up in a chair would cause an immediate, if invisible to the naked eye, inner recoil in an agent.
In a mail/email query, I’d be lying by omission if I let a prospective agent believe I could undertake a lot of high-intensity publicity effort. At what point in the delicate minuet between the first ‘dear agent’ and the final ‘I accept’ should I tell a prospective agent that I might not be the best bet for a book tour or other strenuous promotional activities unless a portable defibrillator is on the table next to the bottled water?
First, focus your energy on your writing. Make it great. You can ride tandem on KY's skateboard if you write well enough.
Book tours are over rated ways to promote books. You can do a lot from home, on the phone and on the net.
You don't have to mention it at the query process. You should mention it when an agent calls and wants to sign you up.
And, a lot of authors go on tour who aren't doing backflips for their morning constitutional. Ya work with what you've got. If we need oiled and muscular pool boys to carry you about on a sedan chair, well, no problem; I have those guys on speed dial.
Write well. We'll figure out the rest.