Single tool with critical definition gaps. Description is present (47 chars) but generic and lacks context on what 'recent' means, when to use it, or what structure is returned. No parameter descriptions exist (none needed given empty schema, but output schema is undocumented). No error handling guidance. Tool returns unstructured JSON string rather than structured output. No pagination, limits, or field documentation. Fails 6+ critical patterns.

• Define explicit input schema with JSON Schema (even if empty, declare it formally). If tool truly takes no params, document this: 'This tool accepts no parameters.'
• Document output schema: 'Returns an object with fields: events (array of {id, timestamp, action, user, details}), total_count (int), time_range (string).'
• Expand description to 80 - 150 chars: 'Retrieve recent Group Protection activity events from the last 24 hours. Returns a list of actions (login, permission_change, etc.) with timestamps and user info. Use this to audit recent changes or investigate security events.'
• Return structured dict/object instead of JSON string. Let FastMCP serialize: `return {'events': data, 'total_count': len(data), 'retrieved_at': datetime.now().isoformat()}`
• Add error handling with recovery hints: if file not found, return `{'error': 'Activity data unavailable', 'recovery': 'Check that events.json exists in the server directory', 'retryable': False}` so LLM knows not to retry.