FindNodeTool
find_node — search the active window's UI tree for nodes matching any combination of text, view_id, class_name, or package_name and return the matches as projections shaped like query_screen entries (see NodeQuery.toMap).
text is a case-insensitive substring match against text + content-description; the other selectors are exact matches (see NodeQuery.matches). Matching is read-only and does not act on the tree.
Params: at least one of text, view_id, class_name, package_name (all optional individually, but one is required); limit (optional, clamped 1–200, default 20).
On success returns count (Int) and nodes (List of node projection maps). Returns a validation error when no selector is supplied, and the long-form notConnectedError message when the service is not bound.