Struct ErrorData 

pub struct ErrorData {
    pub code: ErrorCode,
    pub message: Cow<'static, str>,
    pub data: Option<Value>,
}

Available on crate features mcp and tools only.

Error information for JSON-RPC error responses.

This structure follows the JSON-RPC 2.0 specification for error reporting, providing a standardized way to communicate errors between clients and servers.

Fields

code: ErrorCode

The error type that occurred (using standard JSON-RPC error codes)

message: Cow<'static, str>

A short description of the error. The message SHOULD be limited to a concise single sentence.

data: Option<Value>

Additional information about the error. The value of this member is defined by the sender (e.g. detailed error information, nested errors etc.).

Implementations

impl ErrorData

pub fn new( code: ErrorCode, message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

pub fn resource_not_found( message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

Resource-not-found error (-32002). The server upgrades this to INVALID_PARAMS (-32602) for peers negotiating protocol 2026-07-28 or newer (SEP-2164).

pub fn header_mismatch( message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

pub fn unsupported_protocol_version( requested: ProtocolVersion, supported: &[ProtocolVersion], ) -> ErrorData

Create an unsupported-protocol-version error.

pub fn missing_required_client_capability( required: ClientCapabilities, ) -> ErrorData

Create a missing-required-capability error.

pub fn parse_error( message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

pub fn invalid_request( message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

pub fn method_not_found<M>() -> ErrorData

where M: ConstString,

pub fn invalid_params( message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

pub fn internal_error( message: impl Into<Cow<'static, str>>, data: Option<Value>, ) -> ErrorData

Trait Implementations

impl Clone for ErrorData

fn clone(&self) -> ErrorData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ErrorData

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

Formats the value using the given formatter.

impl Default for ErrorData

fn default() -> ErrorData

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ErrorData

fn deserialize<__D>( __deserializer: __D, ) -> Result<ErrorData, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ErrorData

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

Formats the value using the given formatter.

impl Error for ErrorData

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<ErrorData> for TaskExit

fn from(error: ErrorData) -> TaskExit

Converts to this type from the input type.

impl IntoCallToolResult for ErrorData

fn into_call_tool_result(self) -> Result<CallToolResponse, ErrorData>

impl JsonSchema for ErrorData

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for ErrorData

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ErrorData

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ErrorData