Trait ResultExt 

pub trait ResultExt<T> {
    // Required methods
    fn tool_err(self) -> Result<T, Error>;
    fn tool_context(self, context: impl Into<String>) -> Result<T, Error>;
}

Extension trait for converting errors into tower-mcp tool errors.

Provides ergonomic error conversion methods on Result types, similar to anyhow::Context. Import this trait to use .tool_err() and .tool_context() on any Result whose error type implements Display.

Examples

use tower_mcp::error::ResultExt;

fn query_database() -> tower_mcp::Result<String> {
    let result: Result<String, std::io::Error> =
        Err(std::io::Error::other("connection refused"));
    let value = result.tool_context("database query failed")?;
    Ok(value)
}

Required Methods

fn tool_err(self) -> Result<T, Error>

Convert the error into a tool error.

use tower_mcp::error::ResultExt;
let value: Result<i32, std::io::Error> = Err(std::io::Error::other("timeout"));
let value = value.tool_err()?;

fn tool_context(self, context: impl Into<String>) -> Result<T, Error>

Convert the error into a tool error with additional context.

use tower_mcp::error::ResultExt;
let value: Result<i32, std::io::Error> = Err(std::io::Error::other("timeout"));
let value = value.tool_context("database query failed")?;

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T, E: Display> ResultExt<T> for Result<T, E>

fn tool_err(self) -> Result<T, Error>

fn tool_context(self, context: impl Into<String>) -> Result<T, Error>

Implementors