Guardrails for AI agents scheduling social posts: length checks, approvals and idempotency keys

The article argues that the main risk of letting an AI agent post to social accounts is duplicate or badly sized posts caused by retries, not the writing itself. GPTpost, a social media scheduler for small teams, checks post length when a post is queued, refusing overlong text with HTTP 422 so the agent can shorten it. Agent-created posts still pass through the workspace's approval requirements and plan limits, with 409 and 402 errors returned when those rules block a post. Every write accepts an Idempotency-Key header so that resending the same request returns the original result rather than creating a second post, and the author recommends deriving keys from campaign, slot and account. The product also scopes API keys with limited rights and expiry, and marks posts as published only after network confirmation.