Struct ToolResultPart 

pub struct ToolResultPart {
    pub tool_call_id: String,
    pub tool_name: String,
    pub output: ToolResultOutput,
    pub preliminary: Option<bool>,
    pub provider_metadata: Option<HashMap<String, HashMap<String, JsonValue>>>,
}

The result of executing a tool or function in response to a model’s tool call.

After the model requests a tool invocation via ToolCallPart, the results of that execution are communicated back through this message type. It contains the output from the tool execution, which may be text, structured data, or an error message.

Fields

• tool_call_id - References the ToolCallPart this result corresponds to
• tool_name - Name of the tool that was executed
• output - The result from tool execution (text, structured, or error)
• preliminary - If true, this is a partial result; more results may follow
• provider_metadata - Optional provider-specific details about execution

Including Tool Results in Messages

Tool results must be included in the message history when making subsequent requests, so the model can see what happened and make appropriate follow-up decisions.

Fields

tool_call_id: String

Identifier linking this result to the corresponding tool call

tool_name: String

Name of the tool that was executed

output: ToolResultOutput

The structured output or result from executing the tool

preliminary: Option<bool>

If true, this is a preliminary result and more results may be forthcoming

provider_metadata: Option<HashMap<String, HashMap<String, JsonValue>>>

Optional provider-specific metadata about the tool execution

Trait Implementations

impl Clone for ToolResultPart

fn clone(&self) -> ToolResultPart

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolResultPart

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ToolResultPart

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ToolResultPart

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

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 ToolResultPart