Evidence-backed facts
- LlamaIndex represents functions, query engines, and other capabilities as Tools with names, descriptions, and typed arguments for agent use. informative
- An agent selects a Tool and the LlamaIndex runtime invokes its function or query engine and returns the result. informative
- Indexes, data connectors, model keys, external services, filesystem access, and mutations keep their own credentials and policy. informative
- A Tool definition does not prove indexed data quality, safe execution, external authorization, successful side effects, or a deployed agent. informative