A unified MCP layer with Toolboxes
summary
Toolboxes in Microsoft Foundry creates a single MCP endpoint that composes OpenAPI services, A2A agents and existing MCP servers so teams reuse one unified configuration across agents while enforcing centralized governance and consistent authentication (Entra IDP, OAuth with token refresh and isolation). It supports MCP 07-28 and skills-as-resources, runs long tasks via MCP tasks, and uses server-side tool search so only two functions (tool_search + call_tool) are returned for discovery, cutting token costs and caching tool lists for days.
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chapters (8)
- 0:00Introduction
- 1:05Toolbox pattern philosophy
- 3:31Toolbox benefits
- 6:59Governance and access control
- 9:28Authentication challenges
- 12:17MCP features: skills and 728
- 14:23Progressive tool disclosure
- 18:31Summary
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