When the agent uses tools (web search, etc.), it generates intermediate
narration text like "Let me search..." before each tool call. These were
being sent as separate Telegram messages, causing message spam. Now we
detect tool_use blocks in the message content and skip sending those
intermediate messages — only the final answer reaches the user.
Applied to both Desktop channel plugin and Gateway Telegram service.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>