McpdUpstream.send routed every non-list method through the default-timeout
client, so any tool that legitimately runs past 30s — web_url_read through
a browser solver, a large PDF extraction, a slow retail site — died as
"mcpd proxy error: mcpd did not respond within 30000ms" while mcpd was
still working on it. LibreChat agents hit this constantly on real pages.
New TOOLCALL_TIMEOUT_MS (default 120s, env MCPLOCAL_TOOLCALL_TIMEOUT_MS)
sits between DISCOVERY_TIMEOUT_MS (list calls must stay short so a dead
upstream can't stall session init) and LONG_RUNNING_TIMEOUT_MS (chat and
inference, minutes). withTimeout preserves the caller token and headers.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JaFvfHrQyUKCGv6o3N2Wir
740ce31469