Enum ToolCallError 

pub enum ToolCallError {
    ParameterMismatch(Value),
    ToolExecutionError(Error),
    ToolUnavailable(String),
    ToolNotFound(String),
    ApprovalRequired {
        call_id: String,
        tool_name: String,
        reason: String,
    },
    Rejected {
        reason: String,
    },
}

Errors that can occur during tool execution.

Variants

ParameterMismatch(Value)

The arguments did not match the expected schema.

ToolExecutionError(Error)

The tool encountered a runtime error during execution.

ToolUnavailable(String)

The tool exists but is currently unavailable (e.g. disabled by policy).

ToolNotFound(String)

No tool with the given name is registered.

ApprovalRequired

The tool call requires user approval before proceeding.

Fields

call_id: String

tool_name: String

reason: String

Rejected

The tool call was rejected after an approval request was denied.

Fields

reason: String

Trait Implementations

impl Debug for ToolCallError

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

Formats the value using the given formatter.

impl Display for ToolCallError

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

Formats the value using the given formatter.

impl Error for ToolCallError

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<Error> for ToolCallError

fn from(source: Error) -> Self

Converts to this type from the input type.