expose _meta field for tools

[jurrchen]

_meta is being used by OpenAI's AppsSDK for component display

https://developers.openai.com/apps-sdk/build/examples

I'm having trouble figuring out why the stdio test is failing. Any help would be appreciated here.

[rfu-lt]

Good to see this PR, we also need it!
Can we also support _meta on the @resource as well?

[rinormaloku]

I'll take a look at this in the weekend.

Thanks for the contribution!

[rinormaloku]

@jurrchen @rfu-lt released the latest version that exposes the metadata. Additionally, created these examples on how to create OpenAI apps: https://github.com/rinormaloku/MCP-Nest-Samples/tree/main/pizzaz-openai-apps-sdk

There I am using templating, and it has some limitations, as mcp ResourceTemplates are currently not supported by OpenAI apps sdk, and chatgpt will never query those. That would have been a very quick way of delivering dynamic content to ChatGPT. However, they currently, query all tools, then query all resources for the existing tools, and then cache the resources.

Subscribe to this issue to follow up when this is implemented: openai/openai-apps-sdk-examples#11

There are some reasons why OpenAI might not want to support this, but lets see.