Evidence-backed facts
- Cohere Chat tool use connects Command models to application-defined functions and external services through structured tool definitions and tool calls. informative
- The model produces a tool call, while the application maps the named function, executes it, and returns a tool-result message before requesting a grounded response. informative
- A Cohere API key authorizes the model request only; each external tool keeps its own credentials, scopes, input validation, and side-effect policy. informative
- A declared tool or returned tool call does not prove execution, factual correctness, external-service authorization, successful mutation, or a Plato's Kallipolis production connection. informative