Struct Result 

pub struct Result {
    pub meta: Option<ResultMetaObject>,
    pub result_type: String,
    pub extra: Option<Map<String, Value>>,
}

Latest MCP Protocol 2026_07_28 Common result fields.

JSON schema

{
 "description": "Common result fields.",
 "type": "object",
 "required": [
   "resultType"
 ],
 "properties": {
   "_meta": {
     "$ref": "#/$defs/ResultMetaObject"
   },
   "resultType": {
     "description": "Indicates the type of the result, which allows the client to determine\nhow to parse the result object.\n\nServers implementing this protocol version MUST include this field.\nFor backward compatibility, when a client receives a result from a\nserver implementing an earlier protocol version (which does not include\nresultType), the client MUST treat the absent field as \"complete\".",
     "type": "string"
   }
 },
 "additionalProperties": {}
}

Fields

meta: Option<ResultMetaObject>

result_type: String

Indicates the type of the result, which allows the client to determine how to parse the result object. Servers implementing this protocol version MUST include this field. For backward compatibility, when a client receives a result from a server implementing an earlier protocol version (which does not include resultType), the client MUST treat the absent field as “complete”.

extra: Option<Map<String, Value>>

Trait Implementations

impl Clone for Result

fn clone(&self) -> Result

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Result

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

Formats the value using the given formatter.

impl Default for Result

fn default() -> Result

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Result

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Result> for ServerResult

fn from(value: Result) -> Self

Converts to this type from the input type.

impl From<Result> for ResultFromClient

fn from(value: Result) -> Self

Converts to this type from the input type.

impl From<Result> for MessageFromClient

fn from(value: Result) -> Self

Converts to this type from the input type.

impl From<Result> for MessageFromServer

fn from(value: Result) -> Self

Converts to this type from the input type.

impl Serialize for Result

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

where __S: Serializer,

Serialize this value into the given Serde serializer.