Tool-Use Architectures for Autonomous Agents

Defining the Tool Interface

Every tool an agent can use must have a precise schema definition including input types, output types, error modes, and latency expectations. Ambiguous tool definitions lead to incorrect tool selection and cascading failures in multi-step plans.

Planning and Tool Selection

Modern tool-use agents decompose high-level goals into sub-tasks and match each sub-task to the most appropriate tool. The planning phase considers tool capabilities, estimated latency, and cost to produce an execution plan before any tool is invoked.

Error Recovery in Tool Chains

When a tool call fails mid-workflow, the design may retry, use an equivalent approved path, execute a compensating action, or escalate. Record completed side effects and test recovery for each integration; a log alone cannot guarantee that an external action is reversible.