Which models support this skill?

This skill is designed for Claude 3.5/4.5 Sonnet and Claude 4.1 Opus using the structured-outputs-2025-11-13 beta header.

Does this skill handle complex tool schemas?

Yes, it supports nested objects, arrays, and enums, though it excludes recursive schemas and complex regex constraints.

What is Anthropic's strict tool mode?

Strict tool mode is a feature that guarantees tool input parameters match your provided JSON schema exactly, removing the need for manual validation logic within your functions.

When should I use this skill instead of json-outputs-implementer?

Use this skill for building multi-step agentic workflows and tool execution. Use json-outputs-implementer for simpler tasks like data extraction, formatting, or classification.

Strict Tool Implementer

Name: Strict Tool Implementer
Author: cskiro

bycskiro

API Development

Implements Anthropic’s strict tool mode to ensure guaranteed schema compliance and type-safe execution for multi-step agentic workflows.

About

The Strict Tool Implementer skill enables developers to build reliable agentic systems by leveraging Anthropic's strict tool use mode, which guarantees that tool input parameters perfectly match defined JSON schemas. By eliminating the need for manual validation within tool functions, this skill facilitates the creation of complex multi-tool workflows, robust agent architectures, and production-ready error handling patterns. It is ideal for developers building high-stakes AI applications where precise parameter mapping and type safety are critical for downstream function execution.

Key Features

0 GitHub stars
Multi-step agentic workflow orchestration and composition
Comprehensive agent implementation patterns and architecture
Production-ready tool schema design with guaranteed compliance
Type-safe tool execution for reliable downstream processing
Integrated error handling and validation strategies for tool calls

Use Cases

Implementing complex tools with nested properties for critical operations
Developing type-safe function calling systems to reduce runtime errors
Building multi-step agentic workflows requiring precise parameter validation

About

Key Features

0 GitHub stars
Multi-step agentic workflow orchestration and composition
Comprehensive agent implementation patterns and architecture
Production-ready tool schema design with guaranteed compliance
Type-safe tool execution for reliable downstream processing
Integrated error handling and validation strategies for tool calls

Use Cases

Implementing complex tools with nested properties for critical operations
Developing type-safe function calling systems to reduce runtime errors
Building multi-step agentic workflows requiring precise parameter validation