Give the agent a clear role
Define audience, tone, preferred structure, terminology, and rules. Avoid asking one agent to serve unrelated channels.
Put stable structure in templates
Store headers, footers, placeholders, calls to action, and formatting patterns that should repeat.
Keep facts in the prompt
Provide current dates, names, links, and campaign details for each draft instead of embedding changing facts in the template.
Review the rendered message
Edit the draft manually and preview placeholders, media, branding, and destinations before publishing.