Enum ToolExecutor 

pub enum ToolExecutor {
    HarnBuiltin,
    HostBridge,
    McpServer {
        server_name: String,
    },
    ProviderNative,
}

Where a tool actually ran. Tags ToolCallUpdate so clients can render “via mcp:linear” / “via host bridge” badges, attribute latency by transport, and route errors to the right surface (harn#691).

On the wire this serializes adjacently-tagged so the mcp_server case carries the configured server name. The ACP adapter rewrites unit variants as bare strings ("harn_builtin", "host_bridge", "provider_native") and the McpServer case as {"kind": "mcp_server", "serverName": "..."} to match the protocol’s camelCase convention.

Variants

HarnBuiltin

VM-stdlib (read_file, write_file, exec, http_*, mcp_*) or any Harn-side handler closure registered in tools_val.

HostBridge

Capability provided by the host through HostBridge.builtin_call (Swift-side IDE bridge, BurinApp, BurinCLI host shells).

McpServer

Tool dispatched against a configured MCP server. Detected by the _mcp_server tag that mcp_list_tools injects on every tool dict before the agent loop sees it.

Fields

server_name: String

ProviderNative

Provider-side server-side tool execution — currently OpenAI Responses-API server tools (e.g. native tool_search). The runtime never dispatches these locally; the model returns the already-executed result inline.

Trait Implementations

impl Clone for ToolExecutor

fn clone(&self) -> ToolExecutor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolExecutor

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ToolExecutor

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ToolExecutor

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ToolExecutor

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ToolExecutor

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ToolExecutor

impl StructuralPartialEq for ToolExecutor