| @modelcontextprotocol/core | minor |
|---|---|
| @modelcontextprotocol/server | minor |
BREAKING: Fix error handling for unknown tools and resources per MCP spec
Tools: Unknown or disabled tool calls now return JSON-RPC protocol errors with
code -32602 (InvalidParams) instead of CallToolResult with isError: true.
Users who checked result.isError for unknown tools should catch rejected promises instead.
Resources: Unknown resource reads now return error code -32002 (ResourceNotFound)
instead of -32602 (InvalidParams), per the MCP specification.
Added ProtocolErrorCode.ResourceNotFound to the ProtocolErrorCode enum.