Struct Hints 

pub struct Hints {
    pub read_only: bool,
    pub destructive: bool,
    pub idempotent: bool,
    pub open_world: bool,
}

What a host may assume about a tool, sent as MCP tool annotations: hints for the host and the user, never guarantees. The defaults are MCP’s: a tool may change things, destructively, not idempotently, and reach beyond the module.

Fields

read_only: bool

Changes nothing.

destructive: bool

May delete or overwrite; meaningful only when not read-only.

idempotent: bool

Calling it again with the same arguments changes nothing more.

open_world: bool

Reaches beyond the module’s own data, such as the web.

Trait Implementations

impl Clone for Hints

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Hints

impl Debug for Hints

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

Formats the value using the given formatter.

impl Default for Hints

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Hints

impl PartialEq for Hints

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Hints

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Hints