Mock tools [chapter] deterministic

def get_blog_post(post_id: int) -> dict: return {"id": post_id, "title": "Sample Post"} def analyze_threat(threat_vector: str) -> dict: return {"analysis": "Low risk"} def call_tool(payload: str) -> dict: try: data = json.loads(payload) tool = data.get("tool") args = data.get("arguments", {}) logging.info("Invoking tool %s with args %s", tool, args) if tool == "get_blog_post": result = get_blog_post(**args) elif tool == "analyze_threat": result = analyze_threat(**args) else: raise ValueError(f"Unknown tool: {tool}") return {"success": True, "result": result} except Exception as e: logging.error("Tool call failed: %s", e) return {"success": False, "error": str(e)} def reasoning_loop(observation: str) -> str: