{"command":{"effect":"read","timeoutSeconds":30,"inputSchema":{"type":"object","properties":{"channelId":{"type":"string","title":"Channel ID","minLength":1,"maxLength":2000,"pattern":"^[CDG][A-Z0-9]+$"},"limit":{"type":"integer","title":"Message count","minimum":1,"maximum":20}},"required":["channelId"],"additionalProperties":false},"name":"Read channel messages","id":"slack.messages.list","example":{"channelId":"C12345678","limit":10},"maxRequests":1,"summary":false}}