Unclear What determines which sessions have these fields suppressed is not stated.
What
When Claude Code records telemetry for a tool call, it normally attaches detail fields like file_path, full_command, skill_name, and subagent_type. This now only happens when an additional check passes; in sessions where that check comes back true, none of these detailed fields are attached to the telemetry payload.
Why
This means some sessions send less detailed tool-call telemetry than before, likely to avoid capturing sensitive details like file paths or command text in those cases.
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What determines which sessions have these fields suppressed is not stated.