Scored across 45 tools
The set includes many deprecated aliases (e.g. list_agent_inbox vs search_inbound_items, get_agent_inbox_sources vs get_inbound_item) plus overlapping inbound readers and two webhook update tools, so agents must carefully read deprecation notes to choose correctly. Distinct resources exist, but the duplicated old/new paths create real misselection risk.
Nearly all names use snake_case verb_noun (list_*, get_*, create_*, update_*), which is predictable. Minor deviations like update_webhook versus update_webhook_endpoint and get_mailbox versus get_mailbox_md keep it from being perfect.
45 tools is far above the ideal range, and much of the excess comes from eleven deprecated aliases that remain served. The useful surface is broad but inflated, making this feel heavy and maintenance-prone.
Core lifecycle coverage is good: inbound search/read/pages/actions/quotes, outbound send/list/get/cancel/test/advance, webhook create/list/update/test/deliveries/replay, facility messaging, usage, and MAILBOX.md reads/proposals. Gaps include no delete_webhook_endpoint and no outbound update, but agents can mostly work around them.