read method
A one-shot read (spec §4.5 resource read): fetch and store at
binding. No subscription, no reference count — a document that reads
on every page open must not be holding one more wire subscription per
open. Failures propagate: the action reports them.
Implementation
Future<void> read({
required Client client,
required MCPUIRuntime runtime,
required String uri,
required String binding,
}) async {
_logger.debug('Reading resource', {'uri': uri, 'binding': binding});
final resource = await client.readResource(uri);
_apply(runtime, binding, resource);
}