linear.listIssueLabels returns IDs for issue label changes.
automations/list-linear-labels.automation.ts
teamId and a case-insensitive name substring filter results. limit accepts 1–50 and defaults to 50. after continues pagination. includeArchived controls archived labels. Second argument { account } defaults to the project binding.
Returns { issueLabels: LinearIssueLabel[]; pageInfo: LinearPageInfo }. Labels include hierarchy, team ownership, grouping, description, color, and dates.