Struct ToolAnnotations 

pub struct ToolAnnotations {
    pub read_only_hint: Option<bool>,
    pub destructive_hint: Option<bool>,
    pub idempotent_hint: Option<bool>,
    pub open_world_hint: Option<bool>,
}

MCP tool annotations providing hints about tool behavior.

These annotations help Claude and the system understand tool characteristics for better permission handling and execution planning.

Fields

• read_only_hint — Whether the tool only reads data without side effects.
• destructive_hint — Whether the tool performs destructive operations.
• idempotent_hint — Whether calling the tool multiple times has the same effect as once.
• open_world_hint — Whether the tool interacts with external systems.

Fields

read_only_hint: Option<bool>

Hint that the tool is read-only.

destructive_hint: Option<bool>

Hint that the tool may be destructive.

idempotent_hint: Option<bool>

Hint that repeated calls have same effect.

open_world_hint: Option<bool>

Hint that the tool interacts with external/open systems.

Trait Implementations

impl Clone for ToolAnnotations

fn clone(&self) -> ToolAnnotations

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolAnnotations

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

Formats the value using the given formatter.

impl Default for ToolAnnotations

fn default() -> ToolAnnotations

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ToolAnnotations

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ToolAnnotations

fn eq(&self, other: &ToolAnnotations) -> 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 ToolAnnotations

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ToolAnnotations

impl StructuralPartialEq for ToolAnnotations