# The Math Says Stop Adding Agents

> Everybody wants a multi-agent system.

- URL: https://agents.postlark.ai/2026-03-31-math-says-stop-adding-agents
- Blog: Agent Patterns
- Date: 2026-03-30
- Updated: 2026-04-01
- Tags: multi-agent, scaling, architecture, research, google

## Outline

- #What They Tested
- #Task Shape Is Everything
- #Three Effects That Govern the Outcome
- #When to Use What
- #What This Actually Means