modelcontextprotocol/csharp-sdk
Watch
1
0
Fork
You've already forked csharp-sdk
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 1

Relax outputSchema to any JSON Schema 2020-12 document per SEP-2106 (#1568)

Browse source 
Co-authored-by: Mike Kistler <mikekistler@microsoft.com>
This commit is contained in:
Jayaraman Venkatesan 2026-06-16 18:02:04 -04:00 • committed by GitHub
commit 0663b7c878
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 839 additions and 260 deletions
Download patch file Download diff file Expand all files Collapse all files

47
tests/ModelContextProtocol.Tests/Protocol/ToolTests.cs
View file

@ -147,4 +147,51 @@ public static class ToolTests
Assert.True(JsonElement.DeepEquals(document.RootElement, tool.InputSchema));
}
[Theory]
[InlineData("null")]
[InlineData("3.5e3")]
[InlineData("[]")]
[InlineData("\"a-string\"")]
public static void ToolOutputSchema_RejectsInvalidJsonSchemaDocuments(string invalidSchema)
{
// Per SEP-2106 / JSON Schema 2020-12 §4.3, a schema document is either a JSON object
// or a boolean (true/false). Other JSON values — null literals, numbers, strings,
// arrays — are not valid schema documents and are rejected.
using var document = JsonDocument.Parse(invalidSchema);
var tool = new Tool { Name = "test" };
Assert.Throws<ArgumentException>(() => tool.OutputSchema = document.RootElement);
}
[Theory]
[InlineData("""{"type":"object"}""")]
[InlineData("""{"type":"object","properties":{"name":{"type":"string"}},"required":["name"]}""")]
[InlineData("""{"type":"array","items":{"type":"integer"}}""")]
[InlineData("""{"type":"string"}""")]
[InlineData("""{"type":"number"}""")]
[InlineData("""{"type":"integer","minimum":0}""")]
[InlineData("""{"type":"boolean"}""")]
[InlineData("""{"type":["object","null"],"properties":{"name":{"type":"string"}}}""")]
[InlineData("""{}""")]
[InlineData("""{"oneOf":[{"type":"string"},{"type":"integer"}]}""")]
[InlineData("true")]
[InlineData("false")]
public static void ToolOutputSchema_AcceptsAnyValidJsonSchemaDocument(string validSchema)
{
// Per SEP-2106, OutputSchema accepts any valid JSON Schema 2020-12 document — JSON
// objects (with arrays, primitives, compositions, nullable types) plus the boolean
// schemas `true` (matches any value) and `false` (matches nothing). The `true` form
// also appears organically as the auto-derived schema for an unconstrained `object`
// return type.
using var document = JsonDocument.Parse(validSchema);
Tool tool = new()
{
Name = "test",
OutputSchema = document.RootElement,
};
Assert.NotNull(tool.OutputSchema);
Assert.True(JsonElement.DeepEquals(document.RootElement, tool.OutputSchema.Value));
}
}