Trait ResultExt

Source

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

Expand description

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_types::error::ResultExt;

fn query_database() -> tower_mcp_types::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§

Source

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

Convert the error into a tool error.

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

Source

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

Convert the error into a tool error with additional context.

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