Single tool with reasonable structure but notable gaps. Tool name 'send_notification' is action-verb clear and appropriate for the Gotify domain. Input schema is present with proper types (string, integer) and all four parameters have descriptions. However, descriptions are minimal (10-30 chars each), and output is unstructured plain text rather than a typed schema. No error handling guidance for LLM recovery. The tool performs a write operation (sends notification) but lacks any confirmation pattern or dry-run capability. Missing tool annotations (destructiveHint) that would help agents understand side effects.

• Expand priority parameter description: 'Priority level (integer 1-10, where 1=low, 5=normal, 10=critical). Default: 5.'
• Expand content_type description: 'Content type of the message. Valid values: text/plain, text/markdown, text/html. Default: text/markdown.'
• Add tool description detail: 'Send a notification to Gotify. This is a write operation that immediately delivers the notification to the configured Gotify server. Returns the notification ID or error details.'
• Return structured JSON object instead of plain string: {"success": true, "notification_id": "...", "message": "Notification sent", "timestamp": "2024-01-15T10:30:00Z"}. Include notification_id for potential future reference/recall operations.
• Improve error messages with actionable recovery guidance. Replace 'Error: {e}' with categorized errors: 'Server error: Gotify server at {url} returned 500. Retry in 30 seconds or check server logs.', 'Auth error: GOTIFY_TOKEN is invalid or expired. Update token in environment variables.', 'Invalid input: Priority must be 1-10 (got 'high'). Use numeric priority instead.'
• Add priority validation before HTTP call. Return 'Invalid priority: {priority}. Must be integer 1-10.' if out of range.
• Add content_type validation. Return 'Invalid content_type: {type}. Must be one of: text/plain, text/markdown, text/html.' if not supported by Gotify.
• Add timeout handling with guidance. Wrap AsyncClient POST with asyncio.timeout() and return 'Gotify server timed out after 30s. Check server connectivity or try again.'