Struct ValidationIssue 

#[non_exhaustive]
pub struct ValidationIssue {
    pub severity: Severity,
    pub field: String,
    pub message: String,
    pub code: Option<&'static str>,
}

A validation issue found in an MCP server configuration.

Issues are collected by validate_mcp_server and returned as a Vec. An empty result means the configuration passed all checks.

Extensibility

This struct is marked #[non_exhaustive] to allow adding new fields in future versions without breaking changes. Use the constructor methods ValidationIssue::error and ValidationIssue::warning rather than constructing directly.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

severity: Severity

Severity of the issue.

field: String

The field path where the issue was found (e.g., “command”, “url”, “env.SECRET_KEY”).

message: String

Human-readable description of the issue.

code: Option<&'static str>

Machine-readable issue code for programmatic filtering.

See the CODE_* constants in this module.

Implementations

impl ValidationIssue

pub fn error( field: impl Into<String>, message: impl Into<String>, code: Option<&'static str>, ) -> Self

Creates an error-level validation issue.

Arguments

• field - The field path where the issue was found
• message - Human-readable description
• code - Optional machine-readable code

pub fn warning( field: impl Into<String>, message: impl Into<String>, code: Option<&'static str>, ) -> Self

Creates a warning-level validation issue.

Arguments

• field - The field path where the issue was found
• message - Human-readable description
• code - Optional machine-readable code

Trait Implementations

impl Clone for ValidationIssue

fn clone(&self) -> ValidationIssue

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ValidationIssue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deserialize<'static> for ValidationIssue

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'static>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ValidationIssue

fn eq(&self, other: &ValidationIssue) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ValidationIssue

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ValidationIssue

impl StructuralPartialEq for ValidationIssue