Single tool 'send-notification' has a reasonable name and basic schema, but suffers from significant gaps in error handling, output documentation, and parameter richness. The tool is explicitly registered in src/index.ts with input schema and description visible. However, the description is minimal (50 chars), lacks context for when to use it, and does not explain state-changing implications. No output schema is documented. Error handling is absent, the tool does not validate HTTP responses, handle API failures, or guide recovery. The resource 'get-channels' is present but is not a tool and cannot be invoked by agents directly. Input parameters lack format/constraint details and are not well-guided for LLM use.

• Expand tool description to 100-150 characters: 'Send a notification to a Pushinator channel. Requires a valid UUID channel_id and text content. This action is immediate and cannot be undone, notifications are delivered to all channel subscribers.'
• Add explicit output schema documentation in code comments or tool metadata: 'Returns {message: string, success: boolean}. If success is false, message contains the error from the API.'
• Wrap the fetch call in a try-catch and return structured error responses: 'Failed to send notification: [HTTP status]. If 401, check PUSHINATOR_API_KEY. If 400, validate channel_id is a valid UUID.'
• Add min/max length constraints to content parameter: 'Content must be 1-2000 characters. LLMs cannot see length limits without explicit description.'
• Add validation example to description: '(UUID format for channel_id: 550e8400-e29b-41d4-a716-446655440000)'
• Consider adding optional parameters like 'priority' (enum: low, normal, high) or 'expires_at' (ISO 8601 date) if the Pushinator API supports them, this enriches the tool's utility without adding complexity.
• Document the resource 'get-channels' as a discovery tool and encourage agents to call it first: 'Call get-channels to list available channels before invoking send-notification.'