It's awesome of you to give an inside look into the life of an agent. My writing partner and I are so entralled by everything you get to experience, we've thought of a storyline featuring you as the MC! "The Adventures of GK!" Kidding...or am I? :)
I'm actually writing because I was hoping you could answer a question for me. If someone were to have a full out with an agent, and they overhauled their first chapter, but not much else, would this be reason enough to send an updated version to the agent? Or do you think one chapter wouldn't make or break an agent's decision to offer representation?
Yes, I think that's enough of a difference that you should resubmit. That's the first thing the agent sees--it's possible (though, one would hope, unlikely) that a full could get rejected after the agent reads the first few pages. And it's not like the agent will (as sometimes happens to me) sit there thinking, "I know this is a revision, but what's the difference?" The difference will be obvious. So, yes. Go for it. Make sure everything is just so and and follow the instructions here.
Now, if you had changed a chapter in the middle that wasn't a pivotal scene, I don't think you need to say anything. If you change the end, perhaps send an email that says you've changed the ending, give a short description (a line or two) about the difference, and ask if they'd like to see it.
It's not so much that I think you'll annoy an agent--though I suppose some may be annoyed; do a quick Google search to see if they're quoted saying, "I hate resubmissions more than rudeness, comma splices and phone calls put together!"--but I think this is unlikely. It's more a tactical decision. You only get one of these before you get into "start thinking about writing a very gracious email to smooth things over" territory, so use it wisely.
While we're on the subject, a writer submitted a revision to me this morning and gave me a list of page numbers where I could find the new passages. Very helpful. Gold star.
I think "The Adventures of GK" would be an excellent cartoon or comic strip. :) Can I have magical powers? I'd like the following, in order of preference:
- Safe, instant self-transportation
- Excellent psychic abilities--imagine how much more quickly query/manuscript reading would go!
- Flying, aircraft-free (though perhaps with free tomato juice) for fun and profit. I'd probably need a very thick sweater to avoid being flash-frozen.
All best wishes,