Assistant: produce from supplied context
You provide text and request an improvement. The output is a proposal to review. Example: shorten a caption without changing product facts.
An assistant fits work that stays within a conversation while you perform the final action. Supply the audience, tone and permitted facts.
Automation: execute a known rule
You choose the account, content and date. The system follows that instruction. Example: publish an approved post on Tuesday at 10 a.m. in Europe/Paris.
Quality here depends on reliable triggering, permissions and error handling. Each execution does not require new writing.
Agent: choose a sequence of steps
You provide a goal requiring context and several decisions. Example: review launch tasks, identify missing content and prepare a campaign proposal.
The tool list defines what the agent can do. A task-reading tool is not a publishing tool. MCP integration does not make every product operation automatable.
Combine all three in a campaign
Use the agent to assemble context, the assistant to refine wording and the scheduler to execute an approved publication. Define each handoff: accepted brief, reviewed draft, confirmed date.
When comparing solutions, give both the same brief. Observe what was created, what remains a suggestion and what requires another tool. You get a workflow comparison rather than a slogan comparison.