@ mentions for accounts, datasets, and columns in Agent Conversation

Agent Conversation now supports richer @ mentions for precise entity selection. Previously, typing @ in a chat surfaced only the columns and fields available in the agent's assigned datasets. With this release, @ is expanded to also include accounts and datasets — opening a single searchable dropdown across all three entity types. Pick one and it appears in your message as a styled pill with a hover preview.

The goal was to make exact account names directly referenceable by the user. When you select an account from the @ dropdown, the agent becomes aware of both the exact account name and its underlying account ID — making it a far more reliable match when looking up data, compared to fuzzy-matching on a name alone.

You can add multiple accounts or entities to a single message, and the dropdown respects your accessible accounts list — accounts you don't have access to will not appear as options. Pills also render in conversation history and survive copy/paste.