webmaster tools not indexing tumblr's?

Hello, so I've had several tumblr's I setup over the past few months as tier 1's, and went through them manually to set them up.

I've been on webmaster tools and it's been updating recently but doesn't show any tumblr links? Shows a link from tumbral.com though. (which is a tumblr aggregate site)

Is google picking up on it and not indexing them now? Can anyone confirm their tumblrs are being indexed by WMT?

Are there any tricks to getting them indexed? Would social signals be helpful?

Yes, they are getting indexed with ease.

GWT doesn't show all the links. If it is indexed, Google counts it.

tumblr links will only show up in webmaster tools, if the link in tumblr is in the description area of the page. links in the tumblr posts do not make it to google webmaster tools.