Enum McpError 

pub enum McpError {
    Unauthorized(String),
    CapabilityNotEnabled(String),
    ToolNotFound(String),
    InvalidRequest(String),
    ToolExecution(String),
    Transport(String),
    Internal(String),
}

Top-level error type for MCP operations.

Variants

Unauthorized(String)

The MCP client is not authorized (missing or bad token).

CapabilityNotEnabled(String)

The requested capability (e.g. tools) is not enabled in config.

ToolNotFound(String)

A tool with the given name was not found / not exposed.

InvalidRequest(String)

Invalid request from the MCP client (bad parameters, schema mismatch, etc.).

ToolExecution(String)

An error occurred while executing the underlying RustAPI handler. The inner value is the stringified error (respecting redaction rules).

Transport(String)

Transport-level or protocol-level error.

Internal(String)

Internal / unexpected error.

Implementations

impl McpError

pub fn unauthorized(msg: impl Into<String>) -> Self

Create an unauthorized error.

pub fn invalid_request(msg: impl Into<String>) -> Self

Create an invalid request error.

Trait Implementations

impl Debug for McpError

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

Formats the value using the given formatter.

impl Display for McpError

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

Formats the value using the given formatter.

impl Error for McpError

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.