Expand description
warden report tools — tool call frequency, and the failure rate warden
deliberately refuses to invent.
The ingested event carries the tool_use blocks a model emitted; it does not
carry the tool result, so whether a call succeeded is not in the store.
A 0% failure rate would be a fabrication, so the column renders – and a
note says why: unsupported columns are greyed out rather than printing a
misleading 0.