MCP Tool Budget for AI SaaS: Stop Agents From Burning Tokens, Tools, and Trust

An AI agent does not need to be hacked to become expensive. Sometimes it only needs too many tools, vague permissions, and no spending limit. That is the quiet risk inside many new AI SaaS products. A builder connects an agent to a CRM, database, email tool, analytics API, billing system, and internal knowledge base. The demo feels magical. Then production traffic arrives. The model reads every tool description, calls the wrong endpoint twice, retries a slow workflow, and burns through token bu...