Scored across 31 tools
Every tool has a distinct resource+action target, and the descriptions carry explicit USE WHEN / DO NOT USE sections that preempt exactly the confusions that would otherwise exist (list_subscriptions vs triage_digest vs follow_ups; list_unsubscribe vs unsubscribe vs bulk_unsubscribe; archive vs modify_labels remove INBOX; bulk_modify vs bulk_unsubscribe). Even the near-synonym pairs (mark_read/mark_unread, snooze/unsnooze/sweep_snoozed, undo_bulk_modify vs bulk_modify) are cleanly bounded by direction or by requiring an undo plan.
Consistent snake_case throughout, with a strong verb_noun pattern for most of the surface (list_labels, get_thread, create_filter, modify_labels, download_attachment, bulk_unsubscribe). A handful of bare verbs/nouns break the pattern (search, archive, trash, snooze, unsubscribe, what_changed, follow_ups), but they remain readable and unambiguous in context.
31 tools is heavy by any measure, though the domain (full mailbox triage, labeling, filters, snooze, attachments, unsubscribe, bulk operations with undo) genuinely spans that much surface. Several clusters could be consolidated — mark_read/mark_unread, archive/trash/untrash, and unsubscribe/bulk_unsubscribe all mirror single-call list variants — so the count is at the upper edge of justified.
Coverage is unusually complete: read/search/thread fetch, full label and filter CRUD, archive/trash/restore, snooze lifecycle with sweep, attachment read/download, thread export, incremental history, bulk operations with dry-run, preview tokens and exact undo. Gaps are minor and partly deliberate (no send/reply/forward — explicitly documented as an anti-exfiltration stance; no draft tools, no empty-trash/permanent delete).