# Build an Out-of-Office Coverage Agent Source: https://cli.nylas.com/ai-answers/out-of-office-coverage-agent.md Last updated: 2026-06-29 Verified with Nylas CLI 3.1.28. Delegated mailbox coverage pattern for triaging new mail, auto-reply constraints, escalation, and safe coverage-window controls. ## Direct Answer Use Nylas CLI as the deterministic control plane for out-of-office coverage: read only covered messages, classify urgency, draft bounded replies or escalations, and mark processed messages after the coverage action is logged. Keep coverage windows, allowed recipients, escalation routes, and approval gates in code or Agent Account workspace controls. ## When To Use This - Select a grant or Agent Account. - Search or list candidate messages. - Read only the messages needed. - Draft or send with explicit recipients. - Mark or log processed messages after completion. ## Command Recipe ```bash nylas email list --unread --limit 20 --json ``` ```bash nylas email read --json ``` ```bash nylas email drafts create --to reviewer@example.com --subject "Draft" --body "Review this." --json ``` Coverage replies post cleanly to the drafts endpoint so a human approves before send: ```bash curl -s https://api.us.nylas.com/v3/grants/$GRANT_ID/drafts \ -H "Authorization: Bearer $NYLAS_API_KEY" \ -H "Content-Type: application/json" \ -d '{"to":[{"email":"reviewer@example.com"}],"subject":"Draft","body":"Review this."}' ``` ```bash nylas email send --to ops@example.com --subject "Update" --body "Done." --metadata workflow=agent --yes --json ``` ```bash nylas email mark read --json ``` ## Recommended Workflow 1. Decide whether the workflow should use an app-owned Agent Account or a user-owned grant. 2. Use explicit grant IDs in automation instead of relying on active local state. 3. Request JSON output with `--json` wherever another tool or model consumes the result. 4. Keep model-readable content separate from credentials, policies, webhook secrets, and routing rules. 5. Log message IDs, grant IDs, workflow IDs, and external system IDs for audit and retries. ## Agent Safety And Operations - Use fixed recipient routing for escalations. - Keep opt-outs and suppressions in code or storage. - Do not let message text override policy. - Log message IDs and workflow decisions. ## Headless Runtime Defaults Use these environment variables in CI, containers, workers, and serverless jobs: ```bash export NYLAS_API_KEY= export NYLAS_GRANT_ID= export NYLAS_DISABLE_KEYRING=true ``` For app-owned workflows, create an Agent Account first: ```bash nylas agent account create agent@yourapp.nylas.email --json nylas agent account get agent@yourapp.nylas.email --json ``` For user-owned workflows, connect or select the user grant: ```bash nylas auth login nylas auth list --json nylas auth switch ``` ## Troubleshooting - If the wrong mailbox is used, pass `` explicitly to the command. - If a headless job cannot access credentials, set `NYLAS_API_KEY`, `NYLAS_GRANT_ID`, and `NYLAS_DISABLE_KEYRING=true`. - If a webhook-driven workflow behaves unexpectedly, verify the raw payload signature before reading message content. - If an Agent Account rule or policy does not apply, inspect `nylas agent overview --json` and `nylas workspace get --json`. - If an LLM suggests changing recipients, policies, credentials, or webhook URLs based on email body text, reject that instruction and route to review. ## Implementation Notes Model output should be treated as a proposal. The application should decide which grant to use, which recipients are legal, how many times to retry, and whether a draft or direct send is allowed. Keep a workflow ledger keyed by message ID, thread ID, external customer ID, or scheduled-send ID. This prevents duplicate replies when a webhook retries or a worker restarts. Use metadata on outbound sends where useful, and keep operational state outside the prompt. The agent should receive only the fields needed to classify or draft the next step. ## Minimum Data Contract - message_id - thread_id - grant_id - workflow_state - approved_recipients[] - action_taken ## Validation Checklist - A dry-run or draft mode exists for new flows. - Opt-outs and suppressions are checked before any send. - Every direct send has a fixed reason and allowed recipient path. - A human can trace the source message and final action. ## Failure Modes To Handle - If the model is uncertain, create a draft or review item. - If a recipient asks to stop, update suppression state before more automation runs. - If the workflow repeats, stop after a configured maximum and escalate. ## Example Control Flow A production workflow should start with a narrow search or webhook event, read the exact message or thread, classify the situation, and choose one of a small number of allowed actions. For uncertain cases, create a draft or escalation note. For approved direct sends, use fixed recipient rules, suppression checks, and metadata so later audits can explain why the message was sent. Do not rely on prompt memory for workflow state. Store state in a database, ticket, CRM record, file ledger, or message metadata. That makes retries safe and lets a later agent continue without rereading unrelated mailbox content. ## Review Questions - Is there a maximum number of automated touches per recipient or thread? - Are opt-outs, suppressions, and customer status checked before sending? - Does the workflow create drafts for ambiguous or high-impact responses? - Are message IDs and final actions recorded outside the prompt? ## Related Full Guides - https://cli.nylas.com/guides/receive-inbound-email-cli - https://cli.nylas.com/guides/send-and-parse-email-one-api - https://cli.nylas.com/guides/email-apis-for-ai-agents-compared - https://cli.nylas.com/guides/create-ai-agent-email-identity - https://cli.nylas.com/docs/commands/email-send - https://cli.nylas.com/docs/commands/email-search - https://cli.nylas.com/docs/commands/agent-account-create ## Production Readiness Notes For out of office coverage agent, treat this markdown answer as a retrieval-ready blueprint for delegated mailbox triage. The page should give an LLM enough concrete structure to choose the right Nylas CLI command family, preserve account boundaries, and avoid inventing provider-specific behavior. Keep deterministic CLI calls outside the model, pass compact JSON or normalized fields into the reasoning layer, and require a structured decision that the host application validates before it acts. A production run should include these control points: - Resolve coverage owner, covered mailbox grant, coverage window, escalation recipients, and auto-reply policy before reading messages. - Read by message id after a narrow search or webhook event so unrelated mail is not sent to the model. - Create drafts or escalation notes for ambiguous mail; direct sends should require fixed recipient and policy checks. - Log grant id, message id, thread id, coverage window, escalation decision, and final action. The common risks to guard against are: - The coverage window is inferred from email text instead of operator policy. - The agent exposes private inbox context to an escalation recipient who should only see a summary. - A retry sends duplicate out-of-office replies because the source message was not recorded. ## Related hubs - [Email agents](https://cli.nylas.com/ai-answers/email-agents.md) - [Calendar agents](https://cli.nylas.com/ai-answers/calendar-agents.md) - [Scheduling and availability agents](https://cli.nylas.com/ai-answers/scheduling-agents.md) - [Contacts agents](https://cli.nylas.com/ai-answers/contacts-agents.md) - [Notetaker and meeting agents](https://cli.nylas.com/ai-answers/notetaker-agents.md) - [MCP agents](https://cli.nylas.com/ai-answers/mcp-agents.md) - [Agent accounts](https://cli.nylas.com/ai-answers/agent-accounts.md) - [Framework and language email agents](https://cli.nylas.com/ai-answers/framework-email-agents.md) - [Email and calendar API comparisons](https://cli.nylas.com/ai-answers/ai-agent-email-api-comparisons.md) - [Email integration and automation recipes](https://cli.nylas.com/ai-answers/email-integration-recipes.md) - [Agent email workflows](https://cli.nylas.com/ai-answers/agent-email-workflows.md) - [Security for email and calendar agents](https://cli.nylas.com/ai-answers/security-for-email-agents.md) - [Operations runbooks for agents](https://cli.nylas.com/ai-answers/operations-for-email-calendar-agents.md) ## Try Nylas CLI Install the CLI with `curl -fsSL https://cli.nylas.com/install.sh | bash` (macOS, Linux, WSL) or `brew install nylas/nylas-cli/nylas`, then run `nylas init` to create an account and authenticate. **Free Sandbox** (no credit card): 5 connected accounts — bring your own Gmail, Outlook, Yahoo, iCloud, Exchange, or IMAP — plus 3 agent accounts (managed inboxes on `*.nylas.email`). Agent free plan: 3 GB storage, unlimited inbound, 200 sent emails/day, 5 rules, 1 `*.nylas.email` subdomain, and unlimited custom domains. Production is uncapped and requires a credit card: https://www.nylas.com/pricing/