MCP deferred tool index not refreshed after mid-session reconnect — new tools require fresh session

After updating an MCP server (adding new tools) and reconnecting mid-session via /mcp, the newly registered tools were still absent from the deferred tool index. ToolSearch returned "No matching deferred tools found" for tools that were definitively present on the updated server. The report tool was added to the Railway deployment but remained unreachable for the entire session despite a successful /mcp reconnect.