Struct ToolError 

pub struct ToolError { /* private fields */ }

Error type for tool handlers that supports the ? operator.

This type can be created from any error that implements Display, allowing idiomatic Rust error handling in tool handlers.

Example

use turbomcp_core::response::ToolError;

async fn handler(path: String) -> Result<String, ToolError> {
    // Use ? operator - errors automatically convert to ToolError
    let file = std::fs::read_to_string(&path)?;
    Ok(format!("Read {} bytes", file.len()))
}

// Create errors manually
async fn validate(value: i32) -> Result<String, ToolError> {
    if value < 0 {
        return Err(ToolError::new("Value must be non-negative"));
    }
    Ok("Valid".into())
}

Implementations

impl ToolError

pub fn new(message: impl Into<String>) -> ToolError

Create a new tool error with the given message.

pub fn with_code(code: i32, message: impl Into<String>) -> ToolError

Create a new tool error with a custom error code.

pub fn message(&self) -> &str

Get the error message.

pub fn code(&self) -> Option<i32>

Get the error code, if any.

Trait Implementations

impl Clone for ToolError

fn clone(&self) -> ToolError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolError

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

Formats the value using the given formatter.

impl Display for ToolError

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

Formats the value using the given formatter.

impl Error for ToolError

Available on crate feature std only.

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<&str> for ToolError

fn from(s: &str) -> ToolError

Converts to this type from the input type.

impl From<Box<dyn Error>> for ToolError

Available on crate feature std only.

fn from(e: Box<dyn Error>) -> ToolError

Converts to this type from the input type.

impl From<Box<dyn Error + Sync + Send>> for ToolError

Available on crate feature std only.

fn from(e: Box<dyn Error + Sync + Send>) -> ToolError

Converts to this type from the input type.

impl From<Error> for ToolError

fn from(e: Error) -> ToolError

Converts to this type from the input type.

impl From<Error> for ToolError

Available on crate feature std only.

fn from(e: Error) -> ToolError

Converts to this type from the input type.

impl From<FromUtf8Error> for ToolError

Available on crate feature std only.

fn from(e: FromUtf8Error) -> ToolError

Converts to this type from the input type.

impl From<McpError> for ToolError

fn from(e: McpError) -> ToolError

Converts to this type from the input type.

impl From<ParseFloatError> for ToolError

Available on crate feature std only.

fn from(e: ParseFloatError) -> ToolError

Converts to this type from the input type.

impl From<ParseIntError> for ToolError

Available on crate feature std only.

fn from(e: ParseIntError) -> ToolError

Converts to this type from the input type.

impl From<String> for ToolError

fn from(s: String) -> ToolError

Converts to this type from the input type.

impl IntoToolResponse for ToolError

fn into_tool_response(self) -> CallToolResult

Convert this type into a CallToolResult