Peers can register MCP servers with the mesh and other peers can invoke
those tools through the existing claudemesh connection without restarting.
Broker: in-memory MCP registry with mcp_register/unregister/list/call
handlers, call forwarding to hosting peer with 30s timeout, and automatic
cleanup on peer disconnect.
CLI: mcpRegister/mcpUnregister/mcpList/mcpCall client methods, inbound
mcp_call_forward handler, and 4 new MCP tools (mesh_mcp_register,
mesh_mcp_list, mesh_tool_call, mesh_mcp_remove).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>