Enum ToolClass 

pub enum ToolClass {
    Mcp,
    SelfControl,
    Code,
}

The classes of tool the agentic loop offers the model. This boundary is what keeps two invariants true: a task tool reaches the model ONLY by being exported from a registered MCP server or registered in code by the embedder, and nothing in the catalogue shells out to a local command. EVERY tool the loop advertises is exactly one of these classes; there is no third “general capability library” that could smuggle in an unaudited capability.

• Mcp — a tool discovered from a connected MCP server (tools/list). Dispatched by routing the call BACK to its owning server (dispatch_tool); agentd never runs it locally.
• SelfControl — agentd’s OWN orchestration primitives (see SELF_CONTROL_TOOLS): delegation (subagent.*, a2a.delegate), reactivity (root-only schedule/subscribe/unsubscribe), and resource attention (resource.read). These are handled in-process by a SelfHandler / the runner — NONE shells out. This is the named “self/control” class: the agent’s own control surface, structurally distinct from the MCP task-tool catalogue (a different code path assembles each).

Variants

Mcp

A tool from a connected MCP server; dispatched back to that server.

SelfControl

One of agentd’s own self/control orchestration primitives; handled in-process.

Code

A CODE-REGISTERED tool: native Rust the embedder registered via crate::tools::register — first-party by definition, dispatched in-process, and it WINS a name collision with a remote MCP tool, so a server cannot steal a registered tool’s calls by claiming its name.

Trait Implementations

impl Clone for ToolClass

fn clone(&self) -> ToolClass

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ToolClass

impl Debug for ToolClass

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

Formats the value using the given formatter.

impl Eq for ToolClass

impl PartialEq for ToolClass

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ToolClass