Struct ToolDefinition 

pub struct ToolDefinition {
    pub name: String,
    pub description: String,
    pub input_schema: Value,
    pub annotations: Option<ToolAnnotations>,
}

MCP tool definition — wire-shape mirror of yeti_mcp_domain::types::ToolDefinition.

Kept here so wasm plugin-apps can construct tool definitions against yeti_sdk::prelude::plugins::mcp::ToolDefinition without pulling in yeti-mcp-domain (which is request-band and not part of the SDK surface). yeti-mcp converts to/from the domain type at the dispatch boundary.

Bincode is the on-the-wire format for the hook bridge. We intentionally do not use #[serde(skip_serializing_if)] / #[serde(rename_all)] here — bincode is a positional binary format and omitting fields on serialize but expecting them on deserialize is a decode error. The JSON-friendly attributes live on the domain-side yeti_mcp_domain::types::ToolDefinition and are applied at the dispatch boundary in yeti_mcp::dev_resource::ext_tool_to_rmcp.

Fields

name: String

Tool name (e.g. "yeti_hello", "widgets_list").

description: String

Human-readable tool description shown in MCP clients.

input_schema: Value

JSON Schema describing the tool’s arguments. Most tools use an object schema ({"type": "object", "properties": { ... }}).

Stored as serde_json::Value for ergonomic in-process use; on the bincode wire it serializes as a JSON string to dodge DeserializeAnyNotSupported.

annotations: Option<ToolAnnotations>

Optional MCP-2025-03-26 behavior hints. None is equivalent to “all hints unset.”

Trait Implementations

impl Clone for ToolDefinition

fn clone(&self) -> ToolDefinition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ToolDefinition

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ToolDefinition

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ToolDefinition

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

where __S: Serializer,

Serialize this value into the given Serde serializer.