=
"Override GetPresentationPolicy() in the panel class (or pass a policy to "
"RegisterWindowContent) and return one of: "
"WindowPresentationPolicy::EmbeddedTool().WithHost(\"<surface that embeds "
"it>\") for a tool that acts on another surface's selection (inspector "
"section, tool tab, canvas context-menu popup); OptionalPopOut() for a "
"standalone window users choose to open; "
"Diagnostic().WithHost(\"Command palette\") for developer or validation "
"tooling. CoreWorkspace() is only for an editor's primary work surface and "
"needs a FirstClassPanelAllowlist() entry. See \"Panel admission\" in "
"docs/internal/architecture/editor-ui-module-pattern.md."