AI Governance Engineer
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Guardian agent

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An AI agent whose job is to supervise, check or constrain other agents at runtime; Gartner predicts guardian-agent technologies will account for at least 10 to 15% of agentic AI markets by 2030 1.

Developed in
ch. 04, Layer 04: Runtime Controls & Observability
ch. 23, Runtime guardrails for tool calls
Chapters
ch. 04, The Stack · ch. 23, AI Agents
Contrast with
Guardrail
Source
1 numbered reference, listed below

Where it is used

2 chapters of the Body of Knowledge use the term. Each link opens the first section that does.

  • CIMD

    Client ID Metadata Document: the mechanism by which an OAuth client identifies itself with a URL, used as its client ID, that points to its metadata document.

  • Failure posture

    What a guardrail, guardian agent or tool gateway does when it cannot reach a decision: fail open lets the call through, fail closed blocks it.

  • MCP

    Model Context Protocol: an open protocol for connecting AI applications to tools and data sources; its 2026 specification adds OAuth 2.1 resource-server…

  • Prompt injection

    An input that alters a model's behaviour or output in ways its designers did not intend.

  • Workload identity

    The attributable identity a workload such as an agent carries across every hop, under which its actions are logged and its access is revoked, typically a…

  • Agent (agentic AI)

    An AI system that acts (browses, executes code, calls APIs, moves data or delegates to other agents) under delegated authority, rather than only producing text.

Sources

  1. [1] "Gartner Predicts that Guardian Agents will Capture 10-15% of the Agentic AI Market by 2030" (at least 10 to 15% of agentic AI markets by 2030). Gartner. 2025-06-11. https://www.gartner.com/en/newsroom/press-releases/2025-06-11-gartner-predicts-that-guardian-agents-will-capture-10-15-percent-of-the-agentic-ai-market-by-2030 (verified: primary)

Definitions of legal terms paraphrase the cited text, which governs. Dated statements are as of .

Cite this term

García Aibar, J. (2026). Guardian agent. In AI Governance Engineering: The Thesis & Body of Knowledge (v0.5.0), Glossary. https://doi.org/10.5281/zenodo.22956197. https://aigovernanceengineer.com/glossary/guardian-agent. CC BY 4.0

BibTeX

@misc{aige2026guardianagent,
  author  = {Jorge García Aibar},
  title   = {{Guardian agent}},
  note    = {Glossary, AI Governance Engineering: The Thesis \& Body of Knowledge, version 0.5.0},
  year    = {2026},
  doi     = {10.5281/zenodo.22956197},
  url     = {https://aigovernanceengineer.com/glossary/guardian-agent}
}