Design-partner conversations run founder-direct, so there is one address rather than a routing tree, and the person reading it is the person building the thing. A contact form and a routed inbox come later, when there are enough of you to route.
What to send
What your agents do, where their knowledge lives today, and what they get wrong that you wish they didn't. That is enough for both of us to tell whether a pilot is worth the time. If it isn't, we will say so in the reply rather than book the call anyway.