This procedure is defined in the server but not documented via ad_proc or proc_doc and may be intended as a private interface.
The procedure is defined as:
proc ::nsmcp::questionToolTiming {event} {
if {![dict exists $event durationMs] || ![dict exists $event durationSource]} {return {}}
set value [dict get $event durationMs]
set source [dict get $event durationSource]
if {![string is wideinteger -strict $value] || $value<0 || $value>9007199254740991
|| $source ni {codex-reported codex-observed api-observed}} {return {}}
return [dict create durationMs $value durationSource $source]
}