MCP Server issues

[mint girder]

Trying some mcp stuff and getting errors on fields with IDs

Error: failed to serve module: input: moduleSource.asModule failed to add object to module "mcp-example": failed to validate type def: cannot define field with reserved name "id" on object "Post"

Code: https://github.com/jasonmccallister/mcp-example/blob/ce0cb0ee42046f86173d78765390e2fd75b34a43/main.go#L10

[violet flicker]

which mcp ? 😛

[mint girder]

haha sorry

[lunar trench]

You aren't allowed to have fields named id like here: https://github.com/jasonmccallister/mcp-example/blob/ce0cb0ee42046f86173d78765390e2fd75b34a43/main.go#L12

That shouldn't be specific to mcp, should be a general limitation

[mint girder]

Claude Desktop

{
  "mcpServers": {
    "dagger": {
      "command": "/Users/jason/go/src/github.com/jasonmccallister/dagger/bin/dagger",
      "args": [
        "--progress=plain",
        "-m",
        "github.com/jasonmccallister/mcp-example",
        "mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "anything",
        "_EXPERIMENTAL_DAGGER_RUNNER_HOST": "docker-container://dagger-engine.dev"
      }
    }
  }
}

[mint girder]

That is a common pattern for working with APIs... do we need to document that somewhere?

[lunar trench]

Yeah seems like it doesn't show up anywhere in our docs

[mint girder]

adding it to the list to document.

Everything works with out the id