Expired50% confidenceSolutionExact time
The problem of MCP tools not appearing often lies in the initialization phase, where a protocol version mismatch or excessively large SDK version discrepancy causes the handshake to fail.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/13/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/11/2026(expired)
Sources
MCP协议详解：与Function Calling、Agent的关系及实践指南
bilibili六六科技笔记7/11/2026
Related Claims
UnverifiedMCP distinguishes between protocol-level errors (such as connection drops and timeouts) and tool-level errors (such as invalid parameters and insufficient permissions).78% similarUnverifiedMCP currently remains focused on standardizing tool discovery and invocation formats, while fine-grained permission management control has not yet been incorporated into the core protocol constraints.75% similarUnverifiedLocal small models may not support calling MCP tools75% similarUnverifiedThe MCP solution faces challenges in engineering practice, including compatibility issues caused by frequent protocol version iterations, increased operational complexity from local service process management, and stability impacts from network latency and state synchronization issues.73% similar
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