Enum ToolListChange 

pub enum ToolListChange {
    Added(ToolDescriptor),
    Removed(ToolDescriptor),
    NodeCountChanged {
        descriptor: ToolDescriptor,
        prev_node_count: u32,
    },
}

One change in the set of tools visible to the local capability fold, surfaced by crate::adapter::net::MeshNode::watch_tools. Adapter packages re-emit these to the agent runtime so the model’s tool list stays in sync with the mesh.

Identity for diffing is (tool_id, version); the same tool_id across two versions is two independent slots. Added and Removed carry the full descriptor; NodeCountChanged carries the latest descriptor with the new aggregated node_count plus the previous count.

Plan: see docs/plans/NRPC_AI_TOOL_CALLING_AND_AGENT_DX.md, slice A-5.

Variants

Added(ToolDescriptor)

A (tool_id, version) slot just appeared in the local fold. First-arrival event — the agent should add this tool to its tool list. node_count is the publisher count observed at arrival (typically 1 unless multiple publishers landed in the same diff window).

Removed(ToolDescriptor)

A (tool_id, version) slot disappeared from the local fold — every publisher dropped it (registry removal + announce, or TTL expiry across the board). Carries the last-known descriptor so the adapter has the full shape on hand to do cleanup (e.g. remove from Anthropic tools array by name).

NodeCountChanged

The publisher count for a (tool_id, version) slot changed, but the slot itself stayed present. descriptor.node_count is the new count; prev_node_count was the previously observed value. Useful for load-balancing UI (“3 nodes can serve this tool, up from 1”).

Fields

descriptor: ToolDescriptor

Latest descriptor — node_count is the new aggregated publisher count.

prev_node_count: u32

The publisher count observed before this change.

Trait Implementations

impl Clone for ToolListChange

fn clone(&self) -> ToolListChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolListChange

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

Formats the value using the given formatter.

impl PartialEq for ToolListChange

fn eq(&self, other: &ToolListChange) -> 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 StructuralPartialEq for ToolListChange