Claude.ai reads the flat `_meta["ui/resourceUri"]` key to discover UI apps,
not the nested `_meta.ui.resourceUri`. Without the flat key, tools like
n8n_health_check and n8n_list_workflows showed as collapsed accordions
instead of rendering rich UI. Now sets both keys, matching the behavior
of the official registerAppTool helper from @modelcontextprotocol/ext-apps.
Conceived by Romuald Członkowski - www.aiadvisors.pl/en
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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