Is there a specific app this action is for?
Google Docs
Actions:

• Create a Document Tab
• Retrieve Content from a Content Tab
• Add or replace content within a given Content Tab
• Insert Table
• insertPageBreak
• replaceAllText
  -insertText

Please provide a link to the relevant API docs for the specific service / operation.

GET https://docs.googleapis.com/v1/documents/{documentId}?includeTabsContent=true

https://developers.google.com/workspace/docs/api/reference/rest/v1/documents/request#inserttablerequest
https://developers.google.com/workspace/docs/api/reference/rest/v1/documents
https://developers.google.com/workspace/docs/api/how-tos/tabs