Struct InvalidParamsError 

pub struct InvalidParamsError {
    pub code: i64,
    pub data: Option<Value>,
    pub message: String,
}

A JSON-RPC error indicating that the method parameters are invalid or malformed.

In MCP, this error is returned in various contexts when request parameters fail validation:

• Tools: Unknown tool name or invalid tool arguments
• Prompts: Unknown prompt name or missing required arguments
• Pagination: Invalid or expired cursor values
• Logging: Invalid log level
• Elicitation: Server requests an elicitation mode not declared in client capabilities
• Sampling: Missing tool result or tool results mixed with other content

Fields

code: i64

The error type that occurred.

data: Option<Value>

Additional information about the error. The value of this member is defined by the sender (e.g. detailed error information, nested errors etc.).

message: String

A short description of the error. The message SHOULD be limited to a concise single sentence.

Implementations

impl InvalidParamsError

pub fn new(code: i64, message: String) -> InvalidParamsError

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

Trait Implementations

impl Clone for InvalidParamsError

fn clone(&self) -> InvalidParamsError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InvalidParamsError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for InvalidParamsError

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for InvalidParamsError

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for InvalidParamsError

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 InvalidParamsError