Sample Kotlin MCP server does not follow security best practices from modelcontextprotocol.io specification

[kurt-r2c]

Describe the bug
Sample MCP server does not follow documented best practices of the most recent specification.

To Reproduce

https://github.com/modelcontextprotocol/kotlin-sdk/blob/main/samples/kotlin-mcp-server/src/commonMain/kotlin/server.kt#L100

https://modelcontextprotocol.io/specification/2025-06-18/basic/transports#security-warning

Expected behavior

Examples should follow opinionated best practices. People who are learning will copy-paste this behavior, and as long as it works they probably won't correct it (because they don't understand why it's a problem).

Also, this will cause models to get trained on "bad" behavior.

Logs
N/A

Additional context
N/A