The Telegram agent system prompt advertises send_message but the tool is not included in the agent tool list (schedule tools removed). LLM calls send_message and agent logs 'Tool not found'. Decide whether to add send_message tool back to the Telegram tool list or remove it from the prompt to match supported tools.
Removed send_message/list_pending/cancel_message references from Omni/Agent/Prompts/agents/telegram/system.mustache so the prompt matches the reduced tool set.