Enum ProtocolError

pub enum ProtocolError {
    CapabilityNotSupported(String),
    InvalidCapabilityNegotiation,
    UnexpectedMessageType,
    InvalidMessageSequence,
    ResourceNotFound(String),
    ToolNotFound(String),
    PromptNotFound(String),
    PermissionDenied,
    RateLimitExceeded,
    UnsupportedProtocolVersion(String),
    InitializationFailed(String),
    InvalidSessionState(String),
    MissingParameter(String),
    InvalidParameterValue(String),
}

Protocol-specific errors.

These errors occur at the MCP protocol layer and relate to protocol violations, capability mismatches, or invalid message sequences.

Examples

use mocopr_core::error::ProtocolError;

let error = ProtocolError::ToolNotFound("nonexistent_tool".to_string());

Variants

CapabilityNotSupported(String)

A required capability is not supported by the remote endpoint.

InvalidCapabilityNegotiation

The capability negotiation process failed or was invalid.

UnexpectedMessageType

Received an unexpected message type for the current protocol state.

InvalidMessageSequence

The message sequence violates the protocol specification.

ResourceNotFound(String)

The requested resource was not found on the server.

ToolNotFound(String)

The requested tool was not found on the server.

PromptNotFound(String)

The requested prompt was not found on the server.

PermissionDenied

Access to the requested resource or operation was denied.

RateLimitExceeded

The rate limit for requests has been exceeded.

UnsupportedProtocolVersion(String)

The protocol version is not supported.

InitializationFailed(String)

The initialization handshake failed.

InvalidSessionState(String)

The session is in an invalid state for the requested operation.

MissingParameter(String)

A required parameter is missing from the request.

InvalidParameterValue(String)

A parameter value is out of the valid range or format.

Trait Implementations

impl Debug for ProtocolError

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

Formats the value using the given formatter.

impl Display for ProtocolError

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

Formats the value using the given formatter.

impl Error for ProtocolError

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<ProtocolError> for Error

fn from(source: ProtocolError) -> Self

Converts to this type from the input type.