ExperimentalOptional Readonly ExperimentalmaxOptional Readonly ExperimentalsignalAborts the initialize handshake and every tools/list page. Without it a
server that accepts a request and never answers holds the walk open for as
long as the host's fetch allows — which, for a browser fetch with no
deadline of its own, is indefinitely.
Optional Readonly ExperimentalviewCopied onto every tools/list page so a bounded view cannot expire after page one.
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