Struct CallToolError 

pub struct CallToolError(pub Box<dyn Error>);

A specific error type that can hold any kind of error and is used to encapsulate various error scenarios when a CallToolRequest fails.

Tuple Fields

0: Box<dyn Error>

Implementations

impl CallToolError

pub fn new<E: Error + 'static>(err: E) -> Self

Constructor to create a new CallToolError from a generic error.

pub fn unknown_tool(tool_name: impl Into<String>) -> Self

Specific constructor to create a CallToolError for an UnknownTool error.

pub fn invalid_arguments( tool_name: impl AsRef<str>, message: Option<String>, ) -> Self

Creates a CallToolError for invalid arguments with optional details.

pub fn from_message(message: impl Into<String>) -> Self

Creates a new CallToolError from a string message.

This is useful for generating ad-hoc or one-off errors without defining a custom error type. Internally, it wraps the string in a lightweight error type that implements the Error trait.

Examples

let err = rust_mcp_schema::schema_utils::CallToolError::from_message("Something went wrong");
println!("{:?}", err);

Parameters

• message: Any type that can be converted into a String (e.g., &str or String)

Returns

A CallToolError wrapping a dynamic error created from the provided message.

Trait Implementations

impl Debug for CallToolError

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

Formats the value using the given formatter.

impl Display for CallToolError

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

Formats the value using the given formatter.

impl Error for CallToolError

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<CallToolError> for CallToolResult

Conversion of CallToolError into a CallToolResult with an error.

fn from(value: CallToolError) -> Self

Converts to this type from the input type.

impl From<CallToolError> for RpcError

Converts a CallToolError into a RpcError.

The conversion creates an internal error variant of RpcError and attaches the string representation of the original CallToolError as a message.

fn from(value: CallToolError) -> Self

Converts to this type from the input type.