Enum ActionValidationError 

pub enum ActionValidationError {
    MissingAction,
    MissingField {
        field: String,
    },
    WrongType {
        field: String,
    },
    NotAvailableOverRest {
        action: String,
    },
    UnknownAction {
        action: String,
    },
}

Structured validation failures produced while parsing an action request.

Variants

MissingAction

No action was supplied.

MissingField

A required field was absent or empty.

Fields

field: String

Name of the missing field.

WrongType

A field was present but had the wrong JSON type (expected a string).

Fields

field: String

Name of the wrongly-typed field.

NotAvailableOverRest

The action exists but is MCP-only and cannot be called over REST.

Fields

action: String

The requested action name.

UnknownAction

The requested action name is not recognised.

Fields

action: String

The unrecognised action name.

Implementations

impl ActionValidationError

pub fn code(&self) -> &'static str

Returns a stable machine-readable error code for this variant.

pub fn field(&self) -> Option<&str>

Returns the name of the offending request field, if any.

pub fn bad_value(&self) -> Option<&str>

Returns the offending action name for action-related variants, if any.

pub fn remediation(&self) -> String

Returns human-readable guidance for how to fix the request.

Trait Implementations

impl Debug for ActionValidationError

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

Formats the value using the given formatter.

impl Display for ActionValidationError

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

Formats the value using the given formatter.

impl Error for ActionValidationError

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<ActionValidationError> for ActionError

fn from(source: ActionValidationError) -> Self

Converts to this type from the input type.