Trait McpNamespace 

pub trait McpNamespace {
    // Required methods
    fn mcp_namespace_tools() -> Vec<Value>;
    fn mcp_namespace_tool_names() -> Vec<String>;
    fn mcp_namespace_call(
        &self,
        name: &str,
        args: Value,
    ) -> Result<Value, String>;
    fn mcp_namespace_call_async(
        &self,
        name: &str,
        args: Value,
    ) -> impl Future<Output = Result<Value, String>> + Send;
}

Trait for types that can be mounted as MCP tool namespaces.

Implemented automatically by #[mcp] on an impl block. Allows nested composition: a parent MCP server can mount a child’s tools with a name prefix.

Required Methods

fn mcp_namespace_tools() -> Vec<Value>

Get tool definitions for this namespace.

fn mcp_namespace_tool_names() -> Vec<String>

Get tool names for this namespace (without prefix).

fn mcp_namespace_call(&self, name: &str, args: Value) -> Result<Value, String>

Call a tool by name (sync). Returns error for async-only methods.

fn mcp_namespace_call_async( &self, name: &str, args: Value, ) -> impl Future<Output = Result<Value, String>> + Send

Call a tool by name (async).

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors