When you follow example on following page:
https://developer.atlassian.com/cloud/jira/platform/modules/issue-content/
You will soon find out that in new jira issue view is a bug where tooltip and name is exchanged.
"jiraIssueContents": [
{
"icon": {
"width": 0,
"height": 0,
"url": "/my_icon.svg"
},
"target": {
"type": "web_panel",
"url": "/url_to_panel_content_page.html"
},
"tooltip": {
"value": "This is a tooltip"
},
"contentPresentConditions": [
{
"condition": "user_is_admin",
"invert": false
}
],
"name": {
"value": "My Issue Content Panel"
},
"key": "my-issue-content-panel"
}
]