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AI / Agentic AI Interview Questions

What is Context Bloat in multi-tool agent systems?

Context bloat happens when an agent is connected to many tools or MCP servers at once, and each one injects its own tool metadata, descriptions, and prompts into the model's context window.

  • Overwhelms the model with far more tool information than is relevant to the current task
  • Can degrade the model's ability to pick the right tool, since it's sorting through excessive irrelevant options
  • Increases token cost even when most of that injected context goes unused

Common mitigations include selective tool injection, only exposing tools relevant to the current step, intelligent prompt chaining, and routing tool access through a centralized gateway rather than exposing everything at once.

What causes context bloat in a multi-tool agent system?
What is one common mitigation for context bloat?

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