Struct ToolResultContent 

pub struct ToolResultContent {
    pub meta: Option<Map<String, Value>>,
    pub content: Vec<ContentBlock>,
    pub is_error: Option<bool>,
    pub structured_content: Option<Value>,
    pub tool_use_id: String,
    pub type: ToolResultType,
}

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

The result of a tool use, provided by the user back to the assistant.

Fields

meta: Option<Map<String, Value>>

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

Optional metadata about the tool result. Clients SHOULD preserve this field when including tool results in subsequent sampling requests to enable caching optimizations.

content: Vec<ContentBlock>

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

The unstructured result content of the tool use.

This has the same format as CallToolResult.content and can include text, images, audio, resource links, and embedded resources.

is_error: Option<bool>

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

Whether the tool use resulted in an error.

If true, the content typically describes the error that occurred. Default: false

structured_content: Option<Value>

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

An optional structured result value.

This can be any JSON value (object, array, string, number, boolean, or null). If the tool defined an Tool.outputSchema, this SHOULD conform to that schema.

tool_use_id: String

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

The ID of the tool use this result corresponds to.

This MUST match the ID from a previous ToolUseContent.

type: ToolResultType

👎Deprecated:

Deprecated as of protocol version 2026-07-28 (SEP-2577). Remains in the specification for at least twelve months; see the deprecated features registry.

Implementations

impl ToolResultContent

pub fn new(content: Vec<ContentBlock>, tool_use_id: String) -> ToolResultContent

Creates a value from its required fields; optional fields are None.

Trait Implementations

impl Clone for ToolResultContent

fn clone(&self) -> ToolResultContent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolResultContent

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ToolResultContent

fn deserialize<__D>( __deserializer: __D, ) -> Result<ToolResultContent, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<ToolResultContent> for CreateMessageResultContent

fn from(v: ToolResultContent) -> CreateMessageResultContent

Converts to this type from the input type.

impl From<ToolResultContent> for SamplingMessageContent

fn from(v: ToolResultContent) -> SamplingMessageContent

Converts to this type from the input type.

impl From<ToolResultContent> for SamplingMessageContentBlock

fn from(v: ToolResultContent) -> SamplingMessageContentBlock

Converts to this type from the input type.

impl PartialEq for ToolResultContent

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ToolResultContent

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ToolResultContent