Struct McpError 

#[non_exhaustive]
pub struct McpError {
    pub code: i32,
    pub message: String,
    pub data: MaybeUndefined<Value>,
    pub extra: Map<String, Value>,
}

Available on crate feature unstable_mcp_over_acp only.

UNSTABLE

An inner MCP error, distinct from an outer ACP binding or runtime error.

code and message are required and non-null. data is optional; explicit null is preserved separately from an omitted key.

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.

code: i32

Inner MCP error code; never an ACP error code.

message: String

Inner MCP error message.

data: MaybeUndefined<Value>

Optional error data; explicit null is retained.

extra: Map<String, Value>

Additional fields on the inner MCP error object.

Implementations

impl McpError

pub fn new(code: i32, message: impl Into<String>) -> McpError

Construct an inner MCP error without data.

pub fn data(self, data: Value) -> McpError

Set data, preserving explicit JSON null.

Trait Implementations

impl Clone for McpError

fn clone(&self) -> McpError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for McpError

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for McpError

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 McpError

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for McpError

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 McpError