Tool count is a vanity metric. Annotation coverage is what makes an AI agent safe.

Syndicated from the FavCRM blog. The number that predicts whether an agent is safe to let loose isn't the tool count. When people compare agentic CRMs, they count tools. The number that actually predicts whether an agent is safe to let loose is a different one: annotation coverage. An MCP tool annotation tells the agent what a tool does to the world - whether it reads or mutates, whether it's safe to retry, whether it reaches an external service. Without annotations, the agent is guessing. This is what they are, and why a catalog's annotation coverage matters than its tool count.