Trait CompletionHandler 

pub trait CompletionHandler: Send + Sync {
    // Required method
    fn complete(
        &self,
        request: &CompleteRequest,
        ctx: &Context<'_>,
    ) -> impl Future<Output = Result<CompleteResult, McpError>> + Send;
}

Handler for completion suggestions (completion/complete).

Implement this trait to provide autocomplete suggestions for prompt arguments and resource-template variables. The full CompleteRequest is passed so a handler can dispatch on the ref, read the argument being typed, and use any previously-resolved context. Return a CompleteResult — build one from a Completion via .into() for the common case, or attach result-level _meta with CompleteResult::with_meta. The route layer caps values at MAX_COMPLETION_VALUES.

Required Methods

fn complete( &self, request: &CompleteRequest, ctx: &Context<'_>, ) -> impl Future<Output = Result<CompleteResult, McpError>> + Send

Produce completion suggestions for the request.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T: CompletionHandler> CompletionHandler for Arc<T>

fn complete( &self, request: &CompleteRequest, ctx: &Context<'_>, ) -> impl Future<Output = Result<CompleteResult, McpError>> + Send

Implementors

impl CompletionHandler for CompletionService