LAB · Agents
Tool Schema Builder
Generate a tool contract with JSON Schema, authorization boundaries, idempotency, and expected errors.
- Suggested time
- 15 min
- Output artifact
- A portable definition and a safe-execution checklist.
- Privacy
- Names and parameters are processed locally.
Local educational tool. Validate every result before production use.
When to use it
Tool builder
Use it before exposing an external capability to an agent or when reviewing a tool with ambiguous parameters and excessive permissions.
How to use it well
- 1
Enter a real case without secrets or personal data.
- 2
Run, inspect, and challenge the assumptions; the output is not automatic truth.
- 3
Save the artifact in your project and turn it into a reviewable test or decision.
Related foundations
Agent and Tool Interfaces
04 — Advanced tool use: tool design, error handling, idempotency
Objective: design tools that a model can use effectively: clear contracts, errors that teach, idempotency on retries. This file is transversal: it applies to labs 01–07 and the mini-project.
Open foundation6 min03 — Model Context Protocol (MCP): Architecture and Server Development
Objective: understand what problem MCP solves, its architecture (hosts, clients, servers, primitives), and develop your own server using the Python SDK. Associated Lab: ../labs/05_mcp_server.py
Open foundation6 min03 — Function calling / tool use in OpenAI and Anthropic
Associated Labs: ../labs/03_function_calling_openai.py and ../labs/04_tool_use_anthropic.py
Open foundation