Implement SEP-986: Tool Name Guidance

[devcrocod]

This is a tracking issue for implementation of SEP-986.

Summary

This SEP proposes a standardized format for tool names in MCP to improve consistency, clarity, and interoperability across implementations. Tool names should be 1-64 characters, case-sensitive, and may include alphanumeric characters (a-z, A-Z, 0-9), underscores (_), dashes (-), dots (.), and forward slashes (/). Spaces, commas, and other special characters should not be used.

The Kotlin SDK currently does not validate tool names - the Tool data class accepts any string value for the name property, and the Server.addTool() method performs no format checks. While existing samples use compliant names like get_alerts and get_forecast, there is no enforcement of naming standards. This implementation will add validation logic to check tool name format when tools are registered, including length validation (1-64 characters), character set validation (alphanumeric, _, -, ., /), and appropriate error messages for non-conforming names. For backward compatibility, existing non-conforming tool names should be supported with deprecation warnings for at least one major version.