Telegram MCP has well-structured tool names (verb_noun pattern) and complete input schemas with proper JSON Schema types. However, parameter descriptions are sparse or missing entirely. Most tools lack descriptions of what parameters control (e.g., 'limit' has only '1-100, default 20' with no context on what it limits). Output schemas are not documented, LLMs cannot predict response structure. Error handling is minimal; no recovery guidance. Tool descriptions are adequate (100-150 chars) but lack dependency hints and prerequisites. The server uses STDIO transport, which is a hard cap at 50 regardless of definition quality.

• Document output schemas for all tools. Example: telegram_get_messages should return {messages: [{id, date, from, text, has_media}], total_count, next_cursor}. Include field types and descriptions.
• Expand parameter descriptions to explain context and constraints. E.g., 'limit: Maximum number of messages to return (1-100, default 20). Larger limits may slow response time.' and 'chat_id: Telegram chat ID (numeric) or @username. Use telegram_get_dialogs to discover available chats.'
• Add error recovery guidance in tool descriptions. E.g., 'If chat_id is invalid, call telegram_get_dialogs() to list available chats and retry with a valid ID.'
• Implement pagination for list/search tools. Add next_cursor to responses and document max result limits (e.g., 'Returns up to 100 messages; use next_cursor to fetch older messages').
• Add HTTP/SSE transport support to enable remote client access. STDIO limits deployment to local environments and breaks compatibility with hosted MCP platforms.