`tags` missing on response of Azure Resource Management REST API

This issue is transfered by https://github.com/MicrosoftDocs/feedback/issues/657 from @Qq20180503

**Describe the bug**
I filter Azure Resource Management REST call on tags. However, the response is just displaying the filtered resources not including "tag".

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Resources - List. https://docs.microsoft.com/en-us/rest/api/resources/resources/list
2. Click on 'Try it'
3. Scroll down to Add the $filter parameter with values `tagname eq 'abc' and tagvalue eq '123'` .
[Screenshot1](https://i.stack.imgur.com/rQYQh.jpg)
4. See the response just show the filtered resource not include specified "tag".
[Screenshot2](https://i.stack.imgur.com/isX9n.jpg)

**Expected behavior**
The response should be filtered resources including "tag".

**Screenshots**

**Desktop (please complete the following information):**
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**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Additional context**
Add any other context about the problem here.