Claude Desktop recently introduced rate limits on tool calls, the mechanism that lets Claude interact with your local files, run terminal commands, and access MCP servers. If you are using Claude for serious development work, you will have hit this.
What the Limit Is
The specific numbers vary by plan, but the pattern is the same: heavy tool use in a single conversation burns through your limit faster than simple chat. A session that involves reading 40 files and running 20 terminal commands counts significantly more than a session that is just back-and-forth conversation.
Why It Exists
Tool calls are computationally expensive. Each one requires Claude to process the result, hold it in context, and reason about the next step. For Anthropic, this costs real money at scale. The limit is a cost control measure.
How to Work Around It
Compress your sessions. Be specific about what you need Claude to read, do not ask it to read every file in a directory when you only need two. Use the /compact command before context gets bloated. Start fresh sessions when switching to a new task rather than continuing in the same thread. Batch your tool-heavy work into focused sessions rather than spreading it across a rambling conversation.