Skip to main content

ErrorKind

turbomcp_protocol

Enum ErrorKind

#[non_exhaustive]pub enum ErrorKind {
Show 26 variants    ToolNotFound,
    ToolExecutionFailed,
    PromptNotFound,
    ResourceNotFound,
    ResourceAccessDenied,
    CapabilityNotSupported,
    ProtocolVersionMismatch,
    UrlElicitationRequired,
    UserRejected,
    ParseError,
    InvalidRequest,
    MethodNotFound,
    InvalidParams,
    Internal,
    Authentication,
    PermissionDenied,
    Transport,
    Timeout,
    Unavailable,
    RateLimited,
    ServerOverloaded,
    Configuration,
    ExternalService,
    Cancelled,
    Security,
    Serialization,
}

Expand description

Error classification for programmatic handling.

This enum is #[non_exhaustive] — new variants may be added in future minor releases without a breaking change.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

ToolNotFound

Tool not found (MCP -32001)

ToolExecutionFailed

Tool execution failed (MCP -32002)

PromptNotFound

Prompt not found (MCP -32003)

ResourceNotFound

Resource not found (MCP -32004)

ResourceAccessDenied

Resource access denied (MCP -32005)

CapabilityNotSupported

Capability not supported (MCP -32006)

ProtocolVersionMismatch

Protocol version mismatch (MCP -32007)

UrlElicitationRequired

URL elicitation required (MCP -32042)

UserRejected

User rejected the request (MCP -1)

ParseError

Parse error (-32700)

InvalidRequest

Invalid request (-32600)

MethodNotFound

Method not found (-32601)

InvalidParams

Invalid params (-32602)

Internal

Internal error (-32603)

Authentication

Authentication failed

PermissionDenied

Permission denied

Transport

Transport/network error

Timeout

Operation timed out

Unavailable

Service unavailable

RateLimited

Rate limited (-32009)

ServerOverloaded

Server overloaded (-32010)

Configuration

Configuration error

ExternalService

External service failed

Cancelled

Operation cancelled

Security

Security violation

Serialization

Serialization error

Implementations§

impl ErrorKind

pub fn from_i32(code: i32) -> ErrorKind

Create ErrorKind from a JSON-RPC error code.

Includes standard JSON-RPC codes and MCP-specific codes per 2025-11-25 spec.

pub const fn description(self) -> &'static str

Get a human-readable description

Trait Implementations§

impl Clone for ErrorKind

fn clone(&self) -> ErrorKind

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Copy for ErrorKind

impl Debug for ErrorKind

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

Formats the value using the given formatter. Read more

impl<'de> Deserialize<'de> for ErrorKind

fn deserialize<D>( deserializer: D, ) -> Result<ErrorKind, <D as Deserializer<'de>>::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more

impl Display for ErrorKind

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

Formats the value using the given formatter. Read more

impl Eq for ErrorKind

impl Hash for ErrorKind

fn hash<H>(&self, state: &mut H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more

impl PartialEq for ErrorKind

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl Serialize for ErrorKind

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. Read more

impl StructuralPartialEq for ErrorKind

Auto Trait Implementations§

impl Freeze for ErrorKind

impl RefUnwindSafe for ErrorKind

impl Send for ErrorKind

impl Sync for ErrorKind

impl Unpin for ErrorKind

impl UnsafeUnpin for ErrorKind

impl UnwindSafe for ErrorKind

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<E> IntoToolError for E
where E: Display,

fn tool_err(self, context: impl Display) -> ToolError

Convert to a ToolError with additional context

impl<T> MaybeSend for T
where T: Send + ?Sized,

impl<T> MaybeSync for T
where T: Sync + ?Sized,

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for T
where T: Display + ?Sized,

fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more