When a tool is still declared for the conversation but its provider (for example an MCP server) has disconnected, the tool-not-available error now returns a distinct message telling the model the tool can't run right now, to continue without it, and that it will work again if it reconnects, instead of the generic unavailability message.
Tool-not-available error message covers disconnected MCP-provided tools
A tool whose MCP server disconnected now tells the model to continue without it and that it will work again on reconnect.
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.257,
ImprovementsSection of the release