Q:

Better tag guidance for tags that attract development questions

In spite of our best efforts, we still get daily questions about web application development.
Obviously, people don't read. Part of the problem may be that some of the tags that a web app developer would expect to use exist here and, in general, have very poor usage guidance. (See also: Tag Excerpt (guidance) improvement project)
javascript, at least, has some immediate clue that a developer is in the wrong place and, since they're adding the tag to the question, is pretty much in their face.

Questions about JavaScript are generally OFF-TOPIC here. You might be able to find your answer at Stack Overflow.

Others, not so much. For instance, database only has

System that handles large amounts of data in an organised fashion

There's no guidance there at all. Further, what database question could possibly be on-topic at Web Apps? Most questions are already closed as off-topic (or should be), are about Google Sheets as a database, or are just mis-tagged.
Similar is html:

Markup language used to create the layout of most web pages.

Still, no usage guidance. Unfortunately, there are a few places where using the tag makes seems to make sense: How to get HTML to render in a Google Doc, or in YouTube comments, for instance. But it's also used inappropriately on a bunch of others.
So, my question is multi-layered:

What other tags, due to their lack of usage guidance, seem to be implicitly signaling that development/programming questions are on-topic?
Do those tags make sense to even exist here?
For those that make sense to stay, how can we improve their wiki excerpt?

Some more:

java
mysql

A:

WIP (Work in progress)

javascript, at least, has some immediate clue that a developer is in the wrong place and, since they're adding the tag to the question, is pretty much in their face.

Other tags:
api

What other tags, due to their lack of usage guidance, seem to be implicitly signaling that development/programming questions are on-topic?

APIS:  

google-api,twitter-api,google-chart-api

Languages:  

html5,css,  

Web applications features/components:

user-interface,access-control,accessibility

Web App Developers/developers tools:

facebook-developers,google-developers-console

Do those tags make sense to even exist here?
For those that make sense to stay, how can we improve their wiki excerpt?

