Bambu agent: evaluate MCP server option once tool surface grows

[dderuntz]

ElevenAgents dashboard exposes an MCP tab alongside Tools ("Add server"). Currently empty — we're using three Server Tool webhooks (`get_printer_state`, `get_temperatures`, `get_print_history`) which is the right v0.

When to revisit:

• We add 5+ tools and managing them in the dashboard becomes annoying
• We want tool definitions in version control with code-review on changes
• We want to host tools that need session state (multi-step, requires-context) — easier to model as MCP than as stateless webhooks

Background: docs/BAMBU-DUCK-API-SURVEY.md §5.4.