Missing create_checklist Action

[xenral]

Tried to add a checklist via mcp3_add_checklist_item, but the call fails when the checklist doesn’t already exist. There’s no MCP endpoint to create one, so the flow stalls.

Why it matters:
Any automation relying on MCP must still create the checklist manually in Trello first.

Ask:
Expose a create_checklist action (card ID + name) so agents can spin up a checklist before adding items.

[schwarzSTE]

I ran into the same issue when trying to add checklist items to a card using add_checklist_item.

For testing I created a checklist first, which had the default name “Checklist” — as do most of our checklists. Because the call searches by name globally, it just returns a random checklist rather than the one on the intended card.

The result was that items were added to unrelated checklists on completely different cards, including old ones from years ago.

From what I’ve seen with the Trello API, checklists are scoped to a specific card and identified by unique IDs. Searching or updating by name across the board isn’t reliable, especially with templates or repeated checklist names. The correct behavior would be:
1. Identify the target card.
2. Retrieve the checklists belonging to that card.
3. Match or create the checklist within that card’s context, not globally.

So we would need an endpoint like create_checklist(card_id, name) to support that step before adding items. Alternatively, it could also be created if the given card doesn't have a checklist by that name.

Also not sure is there an endpoint to update checklist states?