Enum ValidationError 

pub enum ValidationError {
    SchemaValidation {
        object_type: String,
        reason: String,
    },
    UnsupportedCapability {
        capability: String,
    },
    InvalidToolParameter {
        tool: String,
        parameter: String,
        reason: String,
    },
    InvalidResource {
        resource: String,
        reason: String,
    },
    InvalidPrompt {
        prompt: String,
        reason: String,
    },
    ConstraintViolation {
        constraint: String,
        reason: String,
    },
}

Validation errors for MCP capabilities and schemas.

These errors occur during validation of server capabilities, tool parameters, resource schemas, etc.

Variants

SchemaValidation

Schema validation failed

Fields

object_type: String

reason: String

UnsupportedCapability

Capability not supported by server

Fields

capability: String

InvalidToolParameter

Tool parameter validation failed

Fields

tool: String

parameter: String

reason: String

InvalidResource

Resource validation failed

Fields

resource: String

reason: String

InvalidPrompt

Prompt validation failed

Fields

prompt: String

reason: String

ConstraintViolation

Constraint violation (size limits, rate limits, etc.)

Fields

constraint: String

reason: String

Trait Implementations

impl Clone for ValidationError

fn clone(&self) -> ValidationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValidationError

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

Formats the value using the given formatter.

impl Display for ValidationError

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

Formats the value using the given formatter.

impl Error for ValidationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ValidationError> for McpError

fn from(source: ValidationError) -> Self

Converts to this type from the input type.