Struct ToolAnnotations 

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

👎Deprecated since 0.14.0:

MCP wire types now come from rmcp::model, the reference SDK, which tracks protocol revisions for us — these hand-rolled types are pinned to MCP 2025-11-25 and do not model 2026-07-28. Scheduled for removal in 0.15.0.

Tool annotations (behavioral hints).

Fields

read_only_hint: Option<bool>

👎Deprecated since 0.14.0:

MCP wire types now come from rmcp::model, the reference SDK, which tracks protocol revisions for us — these hand-rolled types are pinned to MCP 2025-11-25 and do not model 2026-07-28. Scheduled for removal in 0.15.0.

idempotent_hint: Option<bool>

👎Deprecated since 0.14.0:

MCP wire types now come from rmcp::model, the reference SDK, which tracks protocol revisions for us — these hand-rolled types are pinned to MCP 2025-11-25 and do not model 2026-07-28. Scheduled for removal in 0.15.0.

destructive_hint: Option<bool>

👎Deprecated since 0.14.0:

MCP wire types now come from rmcp::model, the reference SDK, which tracks protocol revisions for us — these hand-rolled types are pinned to MCP 2025-11-25 and do not model 2026-07-28. Scheduled for removal in 0.15.0.

open_world_hint: Option<bool>

👎Deprecated since 0.14.0:

MCP wire types now come from rmcp::model, the reference SDK, which tracks protocol revisions for us — these hand-rolled types are pinned to MCP 2025-11-25 and do not model 2026-07-28. Scheduled for removal in 0.15.0.

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 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.