Enum AgentError 

pub enum AgentError {
    ProviderError(ProviderError),
    Cancelled,
    UnexpectedEvent(String),
    ToolError(String),
    TurnBudgetExceeded,
    ContextBudgetExceeded {
        estimated: u32,
        limit: u32,
    },
    DoomLoopDetected(String),
    HookDenied(String),
}

Errors that can occur during agent execution.

Variants

ProviderError(ProviderError)

An error from the underlying LLM provider.

Cancelled

The turn was cancelled via [CancellationToken].

UnexpectedEvent(String)

An unexpected event sequence was received.

ToolError(String)

A tool-related error occurred (lookup failure, execution panic, etc.).

TurnBudgetExceeded

The turn exceeds the maximum allowed tool call budget.

ContextBudgetExceeded

The next provider request would exceed the configured model context.

Fields

estimated: u32

Estimated request tokens, including tool definitions and output reserve.

limit: u32

Configured model context limit.

DoomLoopDetected(String)

A potential doom loop was detected — the same tool was called with identical arguments multiple times in a single turn.

HookDenied(String)

A hook denied the current operation.

Trait Implementations

impl Debug for AgentError

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

Formats the value using the given formatter.

impl Display for AgentError

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

Formats the value using the given formatter.

impl Error for AgentError

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<ProviderError> for AgentError

fn from(source: ProviderError) -> Self

Converts to this type from the input type.