Struct ToolRegistry 

pub struct ToolRegistry { /* private fields */ }

A collection of registered tools.

Implements ToolExecutor so the executor can call tools by name without knowing anything about their implementation.

Tools are registered once at startup and never mutated during execution. If the tool name is not in the registry, call() returns NotFound.

Implementations

impl ToolRegistry

pub fn new() -> Self

Create an empty registry.

pub fn set_cost_override(&mut self, tool_name: &str, cost: u64)

Override the declared cost for a tool.

Reads from nanny.toml [tools.<name>] cost_per_call. When set, declared_cost() returns this value instead of the tool’s own declared cost.

pub fn register(&mut self, tool: Box<dyn Tool>)

Register a tool.

If a tool with the same name is already registered, it is replaced. The registry takes ownership of the tool via Box<dyn Tool>.

pub fn registered_names(&self) -> Vec<&str>

Return the names of all registered tools.

Useful for debugging and nanny init suggestions.

Trait Implementations

impl Default for ToolRegistry

fn default() -> Self

Returns the “default value” for a type.

impl ToolExecutor for ToolRegistry

fn call(&self, name: &str, args: &ToolArgs) -> Result<ToolOutput, ToolCallError>

Call a registered tool by name.

Returns NotFound if no tool with that name is registered. Returns Execution if the tool was found but failed.

fn declared_cost(&self, name: &str) -> Option<u64>

Return the cost of a registered tool.

If a cost override was set via set_cost_override, that value is used. Otherwise falls back to the tool’s own declared cost. Returns None if the tool is not registered.