Module tool 

Available on crate feature async only.

The Tool async trait and its companion ToolError.

Tool is the foundation for every tool-dispatch shape: direct trait implementations, closure adapters via FnTool, and schemars-driven typed handlers (crate::tool_dispatch::TypedTool) all reduce to a dyn Tool stored in the registry.

ToolApprover is the mid-stream approval gate: each pending tool call is passed to an approver before it executes; return ApprovalDecision::Deny to short-circuit the tool and inject an error result instead.

Enums

ApprovalDecision

Verdict from a ToolApprover for a single tool_use invocation.

ToolError

Errors a Tool implementation can return.

Traits

Tool

A tool the model can invoke during generation.

ToolApprover

Async-callable predicate consulted before each tool dispatch.

Functions

fn_approver

Wrap an async closure into a ToolApprover.