v0.1.2 — richer tool definitions

Improves every tool + parameter description for clarity to AI agents: paid tools (provision, extend) clearly flag that they spend real USDC, destroy_server flags it is irreversible, read-only tools are marked as such, and every parameter is documented. No behavior change. Install: npx -y @agentmetal/mcp · Registry: dev.agentmetal/agentmetal.