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← Back to all updatesPublished ·Anthropic• Minor
Anthropic added MCP tunnels research preview, self-hosted sandboxes, and active-session MCP server and tool configuration updates.
The read
Private-network MCP access and self-hosted execution move more agent runtime control outside Anthropic's infrastructure.
The frame
For Claude Managed Agents, builders get private MCP connectivity, self-hosted tool execution, and session-level tool configuration changes.
Primary source
Anthropic →Keep reading
See what Nova3 builds →Related updates
- Jun 12, 2026Anthropic publicly documented stop_details on refusal responses, with category and explanation fields for routing.
- Jun 12, 2026Claude Opus 4.8 defaults the effort parameter to high across all surfaces.
- Jun 12, 2026Claude Opus 4.8 lowers prompt caching’s minimum cacheable prompt length to 1,024 tokens versus Opus 4.7.
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