feat: Add audio type according to 2025-03-26 spec

[SeanChinJunKai]

Motivation and Context

This PR provides added support for audio data

How Has This Been Tested?

NA

Breaking Changes

NA

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

References: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/schema/2025-03-26/schema.ts#L990

[Copilot]

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/types.kt:886

• The documentation for PromptMessageContentMultimodal should be updated to reflect that it now supports audio content in addition to text and image.

 * Represents prompt message content that is either text or an image.

src/commonMain/kotlin/io/modelcontextprotocol/kotlin/sdk/types.kt:932

• AudioContent is a new functionality that currently lacks test coverage; please add appropriate tests to verify its behavior.

 * Audio provided to or from an LLM.

[SeanChinJunKai]

@e5l I missed updating the documentation let me make the change

[e5l]

Could you also add a test?

[SeanChinJunKai]

Hi @e5l, I will look into it

[SeanChinJunKai]

Hi @e5l, have added a unit test for this PR. Im planning to add more unit tests in a separate PR