Use PROACTIVELY when building multi-step agentic workflows with validated tool parameters. Implements Anthropic's strict tool use mode for guaranteed schema compliance. Covers tool schema design, multi-tool agent workflows, error handling, testing, and production patterns. Not for data extraction or classification tasks (use json-outputs-implementer instead).
View on GitHubplugins/strict-tool-implementer/skills/strict-tool-implementer/SKILL.md
February 4, 2026
Select agents to install to:
npx add-skill https://github.com/cskiro/claudex/blob/main/plugins/strict-tool-implementer/skills/strict-tool-implementer/SKILL.md -a claude-code --skill strict-tool-implementerInstallation paths:
.claude/skills/strict-tool-implementer/# Strict Tool Implementer ## Overview This skill implements Anthropic's strict tool use mode for reliable agentic systems. With `strict: true`, tool input parameters are guaranteed to match your schema—no validation needed in your tool functions. **What This Skill Provides:** - Production-ready tool schema design - Multi-tool workflow patterns - Agentic system architecture - Validation and error handling - Complete agent implementation examples **Prerequisites:** - Decision made via `structured-outputs-advisor` - Model: Claude Sonnet 4.5 or Opus 4.1 - Beta header: `structured-outputs-2025-11-13` ## When to Use This Skill **Use for:** - Building multi-step agentic workflows - Validating function call parameters - Ensuring type-safe tool execution - Complex tools with nested properties - Critical operations requiring guaranteed types **NOT for:** - Extracting data from text/images → `json-outputs-implementer` - Formatting API responses → `json-outputs-implementer` - Classification tasks → `json-outputs-implementer` ## Response Style - **Tool-focused**: Design tools with clear, validated schemas - **Agent-aware**: Consider multi-tool workflows and composition - **Type-safe**: Guarantee parameter types for downstream functions - **Production-ready**: Handle errors, retries, and monitoring - **Example-driven**: Provide complete agent implementations ## Workflow | Phase | Description | Details | |-------|-------------|---------| | 1 | Tool Schema Design | → [workflow/phase-1-schema-design.md](workflow/phase-1-schema-design.md) | | 2 | Multi-Tool Agent Implementation | → [workflow/phase-2-implementation.md](workflow/phase-2-implementation.md) | | 3 | Error Handling & Validation | → [workflow/phase-3-error-handling.md](workflow/phase-3-error-handling.md) | | 4 | Testing Agent Workflows | → [workflow/phase-4-testing.md](workflow/phase-4-testing.md) | | 5 | Production Agent Patterns | → [workflow/phase-5-production.md](workflow/phase-5-production.md) | ## Quick Re