# ValidationMessage

> Tracon documentation. Tracon is a .NET package family that adds a control
> plane on Microsoft Agent Framework, published as NuGet packages that run
> inside your own ASP.NET Core application.
>
> Page: https://tracon.dev/http-api/schemas/validationmessage/
> Summary: OpenAPI request or response schema for ValidationMessage, including required fields, defaults, constraints, and linked nested types.

[← All HTTP schemas](/http-api/schemas/)

A single finding produced by the validation of an agent definition.

**Shape:** `object`

| Property | Required | Type | Description | Rules |
|---|---|---|---|---|
| `severity` | yes | [`ValidationSeverity`](/http-api/schemas/validationseverity/) | Gets the severity of the finding. | — |
| `code` | yes | `string` | Gets the stable machine-readable code, for example `unknown_tool` or `cycle`. | — |
| `message` | yes | `string` | Gets the human-readable description. It is not translated. | — |
| `path` | no | `string` | Gets the path of the offending field inside the definition, for example `toolNames[2]`. It is `null` when the finding points at no field. | — |