What
A new built-in tool, RefreshMcpTools, lets Claude re-query tool lists from connected MCP servers and update its available tool set without restarting the session. It reports which tools were added or removed.
Usage
# Refresh all connected servers
RefreshMcpTools
# Refresh a specific server
RefreshMcpTools({ server: "myserver" })Details
- Triggers when a device or app comes online after a failed tool call, when expected tools are missing, or when a server's tools look stale after reconnection.
- Returns per-server status:
refreshed(tool list applied),error(previous list kept), ornot_connected(server offline — this tool never dials). - Reports
toolCount,added, andremovedfor each refreshed server. - Only activates when MCP clients are connected; hidden when no servers are configured.
- Does not re-dial disconnected servers — it only re-reads over existing live connections.
Evidence
Complete new tool definition (search for "RefreshMcpTools")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.