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The gnubok_connect_bank and gnubok_connect_skatteverket tools now carry definition-level _meta.ui.resourceUri pointing at a new connect-card MCP Apps widget. On claude.ai/Claude Desktop the tool result renders as a card with an "Öppna i webbläsaren" button that sends the host a ui/open-link request from the click handler (the sanctioned new-tab mechanism; custom connectors always get Claude's confirmation modal, so the destination URL is shown in the card). Clients that do not render MCP Apps (Claude Code) keep the connect_url in the structured result as before. Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com> Co-authored-by: Claude Fable 5 <noreply@anthropic.com>