Get a specific email by ID with full content
gmail:get-email
{ "type": "object", "properties": { "messageId": { "type": "string", "description": "Email message ID" }, "format": { "type": "string", "description": "Format: full, metadata, minimal, raw" }, "end_user_id": { "type": "string", "description": "End-user ID for per-user OAuth token resolution" } }, "required": [ "messageId" ], "description": "Input schema for the gmail:get-email tool." }