Struct CallToolResult 

pub struct CallToolResult {
    pub content: Vec<Content>,
    pub is_error: Option<bool>,
    pub structured_content: Option<Value>,
    pub _meta: Option<Meta>,
}

Tool call result

Fields

content: Vec<Content>

is_error: Option<bool>

structured_content: Option<Value>

_meta: Option<Meta>

Implementations

impl CallToolResult

pub fn success(content: Vec<Content>) -> Self

pub fn error(content: Vec<Content>) -> Self

pub fn text(text: impl Into<String>) -> Self

pub fn error_text(text: impl Into<String>) -> Self

pub fn input_validation_error( field: impl Into<String>, message: impl Into<String>, ) -> Self

Create an input validation error result (MCP 2025-11-25)

Per the MCP 2025-11-25 spec, input validation errors should be returned as tool execution errors (with is_error: true) rather than protocol errors. This enables the LLM to self-correct based on the error feedback.

Example

use pulseengine_mcp_protocol::CallToolResult;

// When validating tool arguments fails:
let result = CallToolResult::input_validation_error(
    "location",
    "Expected a valid city name, got empty string"
);

pub fn structured(content: Vec<Content>, structured_content: Value) -> Self

Create a success result with structured content

pub fn structured_error( content: Vec<Content>, structured_content: Value, ) -> Self

Create an error result with structured content

pub fn text_with_structured( text: impl Into<String>, structured_content: Value, ) -> Self

Create a result with both text and structured content

pub fn validate_structured_content(&self, output_schema: &Value) -> Result<()>

Validate structured content against a schema

Errors

Returns an error if the structured content doesn’t match the provided schema

Trait Implementations

impl Clone for CallToolResult

fn clone(&self) -> CallToolResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CallToolResult

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CallToolResult

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CallToolResult

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

where __S: Serializer,

Serialize this value into the given Serde serializer.