Enum TaskHint 

pub enum TaskHint {
    Never,
    Optional,
    Always,
}

Task hint for tool invocation (MCP 2025-11-25 draft, SEP-1686)

Indicates how a tool should be invoked with respect to task augmentation. Note: This is kept for backward compatibility. The newer API uses ToolExecution.task_support with TaskSupportMode.

Variants

Never

Tool MUST NOT be invoked as a task (default behavior)

Optional

Tool MAY be invoked as either a task or normal request

Always

Tool SHOULD be invoked as a task (server may reject non-task calls)

Trait Implementations

impl Clone for TaskHint

fn clone(&self) -> TaskHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TaskHint

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TaskHint

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for TaskHint

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TaskHint

fn eq(&self, other: &TaskHint) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for TaskHint

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for TaskHint

impl Eq for TaskHint

impl StructuralPartialEq for TaskHint