Xcode 26.3 MCP xcode-tools: RunSomeTests / RunAllTests response violates tool output schema (missing required errors per test) I’m using the MCP server “xcode-tools” shipped with Xcode 26.3 to run tests. Two tools fail consistently due to a schema mismatch: RunSomeTests RunAllTests Steps Call XcodeListWindows and get a valid tabIdentifier for my workspace. Call GetTestList with that tabIdentifier. This works and returns test identifiers like: ChatKitManagerCreationTests/testInitializesWithDependencies() Call RunSomeTests with tests = [{ targetName, testIdentifier }, …] (or call RunAllTests). Actual result The tool call fails with an MCP schema validation error like: Structured content does not match the tool's output schema: data/results/0 must have required property 'errors', data/results/1 must have required property 'errors', ... Why this looks like an xcode-tools bug According to the tool descriptor JSON for RunSomeTests / RunAllTests, each element of results[] is required to contain: targetName identifier displayName state errors (required, array of strings) But the actual response returned by RunSomeTests / RunAllTests appears to omit the errors field for one or more results (for passed tests it should still be present as an empty array []). Expected result RunSomeTests / RunAllTests always return structured content matching their declared output schema. In particular, every results[i] should include errors: [] when there are no errors. Environment Xcode: 26.3 macOS: Darwin 25.4.0 Workspace: Grocery.xcworkspace Scheme: GroceryCoreTests Active test plan: GroceryCoreTests Question Is this a known issue in Xcode 26.3’s MCP xcode-tools? Is there a workaround (e.g. alternative output mode, or reading a full summary file) until the schema/response is fixed?