Unverified50% confidenceCautionExact time
Clients and servers written against the old MCP specification will be unable to communicate normally with the new specification, and code paths that rely on session state, handshake flows, or stream resumability may break.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/16/2026
First Seen
Valid until: 12/15/2026
Sources
Related Entities
Related Claims
UnverifiedThe stateful persistent connection mode of older MCP versions has a fundamental conflict with the ephemeral execution model of Serverless.75% similarUnverifiedUnder the old MCP specification, GitHub MCP and many distributed MCP servers could not support elicitation, because it requires cross-server communication to coordinate state and sessions.74% similarUnverifiedCustom Agents inherit the MCP configuration of the main conversation by default, but incomplete configuration of the Tools field may cause MCP tools to be stripped.73% similarUnverifiedMCP 2.0 changed the protocol to be stateless and sessionless, which is a breaking change.72% similarVerifiedMCP currently lacks fine-grained permission control, and third-party servers of unknown origin may contain malicious instructions.72% similar
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