mcp kotlin server does not process JSONRPCRequest with null param, but python sdk may send with null param

[shendaxia-sm]

Describe the bug

this request works with kotlin mcp server:

{“id”:“1”,“jsonrpc”:“2.0”,“method”:“tools/list”,“params”:{}}

but this request not works:

{“id”:“1”,“jsonrpc”:“2.0”,“method”:“tools/list”}

python sdk client send with null params, but kotlin sdk deserialize json with default null param, and will not invoker handler when param lis null

so kotlin sdk should set params default to EmptyJsonObject

To Reproduce
Steps to reproduce the behavior:
use python SSE Transport client send list tool command to a kotlin mcp server, will reproduce this issue.

Expected behavior
A clear and concise description of what you expected to happen.

Logs
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Additional context
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[e5l]

Hey @shendaxia-sm, thanks for the report.

[tomakehurst]

This looks like the same issue as #56, which has a draft fix in PR #58