List past Claude Code sessions, newest first, with the project, time span, number of turns and prompts, per-model token usage and a tally of which tools were called. Use it to answer questions like which projects were worked on last week or which session was the long one. Returns counts only, never the text of any message.

Full counts for a single session id: duration in seconds, turns, prompts, subagent turns, damaged lines, per-model token usage and the combined totals. Take the id from list_sessions. Returns counts only, never the text of any message.

Count how often each Claude Code tool (Read, Edit, Bash, Grep and the rest) was called across the sessions matching the filters, most used first. Use it to answer questions about working habits, such as how much of a week was reading versus editing. Returns tool names and counts, never tool arguments.