Enum McpAppError 

#[non_exhaustive]
pub enum McpAppError {
    InvalidUiUri(String),
    InvalidHtmlDocument,
    InvalidCspOrigin {
        origin: String,
        directive: &'static str,
    },
    InvalidDomain(String),
    InvalidVisibility,
    EmptyField(&'static str),
    Metadata(MetaValidationError),
    Serialization(Error),
}

A validation or construction error from the typed MCP Apps API.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

InvalidUiUri(String)

The resource URI did not satisfy the MCP Apps ui:// requirement.

InvalidHtmlDocument

The resource body did not look like a complete HTML5 document.

InvalidCspOrigin

A CSP source was not a permitted origin.

Fields

origin: String

The rejected source.

directive: &'static str

The metadata field being configured.

InvalidDomain(String)

A dedicated sandbox domain was malformed.

InvalidVisibility

Tool visibility was empty or contained duplicate entries.

EmptyField(&'static str)

A required human-readable value was empty.

Metadata(MetaValidationError)

Protocol metadata failed the core _meta grammar.

Serialization(Error)

Typed metadata could not be converted to JSON.

Trait Implementations

impl Debug for McpAppError

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

Formats the value using the given formatter.

impl Display for McpAppError

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

Formats the value using the given formatter.

impl Error for McpAppError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for McpAppError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<MetaValidationError> for McpAppError

fn from(source: MetaValidationError) -> Self

Converts to this type from the input type.