Struct CallToolRequestParams 

pub struct CallToolRequestParams {
    pub name: String,
    pub arguments: Option<HashMap<String, Value>>,
    pub input_responses: Option<HashMap<String, InputResponse>>,
    pub request_state: Option<String>,
    pub meta: RequestMetaObject,
}

Parameters for tools/call request — CallToolRequestParams extends InputResponseRequestParams. Carries the SEP-2322 multi-round-trip mixin (inputResponses?, requestState?) in addition to the tool-call-specific name and arguments.

Fields

name: String

Name of the tool to call.

arguments: Option<HashMap<String, Value>>

Arguments to pass to the tool — { [key: string]: unknown }.

input_responses: Option<HashMap<String, InputResponse>>

Responses to a prior InputRequiredResult (mixin from InputResponseRequestParams).

request_state: Option<String>

Verbatim echo of InputRequiredResult.requestState (mixin).

meta: RequestMetaObject

Schema-typed _meta per RequestMetaObject. Required per schema (CallToolRequestParams extends InputResponseRequestParams extends RequestParams, and RequestParams._meta is required in 2026-07-28 stateless core).

Implementations

impl CallToolRequestParams

pub fn new( name: impl Into<String>, meta: RequestMetaObject, ) -> CallToolRequestParams

Construct with the required _meta and tool name.

pub fn with_input_responses( self, responses: HashMap<String, InputResponse>, request_state: impl Into<String>, ) -> CallToolRequestParams

Attach prior InputRequiredResult responses + verbatim state echo.

pub fn get_arguments(&self) -> Option<&HashMap<String, Value>>

Get arguments as HashMap - CRITICAL: Use this instead of the trait method The trait method has limitations due to lifetime issues with HashMap->Value conversion

pub fn get_arguments_as_value(&self) -> Option<Value>

Get arguments as Value (converted from HashMap)

pub fn with_arguments( self, arguments: HashMap<String, Value>, ) -> CallToolRequestParams

pub fn with_arguments_value(self, arguments: Value) -> CallToolRequestParams

pub fn with_meta(self, meta: RequestMetaObject) -> CallToolRequestParams

Trait Implementations

impl Clone for CallToolRequestParams

fn clone(&self) -> CallToolRequestParams

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CallToolRequestParams

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CallToolRequestParams

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl HasCallToolRequestParams for CallToolRequestParams

fn name(&self) -> &String

fn arguments(&self) -> Option<&HashMap<String, Value>>

Tool arguments map. Schema’s arguments?: { [key: string]: unknown }.

fn meta(&self) -> Option<&HashMap<String, Value>>

impl Params for CallToolRequestParams

impl SerdeParamExtractor<CallToolRequestParams> for CallToolRequestParams

type Error = McpError

fn extract_serde( params: RequestParams, ) -> Result<CallToolRequestParams, <CallToolRequestParams as SerdeParamExtractor<CallToolRequestParams>>::Error>

Extract parameters using serde deserialization

impl Serialize for CallToolRequestParams

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.