Recent or slowest calls of one tool, and its calls per day

Lists the calls of the tool name whose tool_use event was stored in [since, until), with the scopes, period and agent_id of GET /v1/usage/tools; the period spans at most 366 days. sort=recent (the default) lists the latest occurred_at first, sort=slowest the longest duration_ms first with untimed calls last; ties go to the later event. Read the next page with next_cursor, which is null on the last page; a cursor from the other sort is 400.

session_id and title are null for a session the caller may not read (one in another owner, one not shared with the caller, or a workspace-scoped session of an agent whose managing team the caller is outside while agent_outsider_session_visibility is managing_team); the call's time, duration, outcome and agent still show. agent is null for a session made without an agent. outcome is unknown while no result is paired or when the result's is_error is not a boolean; duration_ms is null without a paired result or with either time missing, and set even when outcome is unknown. per_day counts the tool's calls on every UTC date the period touches, zeros included. Calls show up within one reconciler pass of being stored. It changes nothing.

Scope: sessions:read (API key or cookie session).