TL;DR: 78% of enterprises run two or more model families, showing why the AI gateway is central to agent harness governance, in Tetrate's survey data. Identity and access teams need that shared layer to keep routing, policy, and telemetry consistent across models and tools.
Editorial analysis by NHI Mgmt Group, based on content published by Tetrate: “The AI Gateway Is the Meta-Provider for Your Agent Harness”.
By the numbers:
- 78% of companies ran two or more model families in 2026, according to the article.
Key questions
Q: Why do AI agents need centralized governance when they access multiple tools and models?
A: AI agents increase risk because they can invoke tools, move across systems, and act without direct human supervision.
Q: What are the signs that an AI harness is being governed too locally?
A: Common signs include per-agent keys, session-only approvals, scattered logs, and inconsistent tool policies across harnesses.
Q: How should security teams govern multiple AI models across one agent stack?
A: Security teams should govern the shared request path, not each harness in isolation.
Practitioner guidance
- Define a shared request-path control plane Move model routing, tool authentication, policy enforcement, and audit logging into one governed layer that every harness must traverse.
- Scope MCP access by approved capability profiles Bundle only the tools an agent needs into profiles and authenticate access to those profiles instead of exposing raw server inventories.
- Separate model credentials from tool credentials Avoid letting a harness manage all access itself; keep provider keys, tool grants, and approval boundaries under different administrative controls.
Bottom line: AI agent stacks are moving toward a shared control layer where routing, policy, and telemetry sit beneath individual harnesses.
Glossary terms: Agent Harness, Meta-Provider, AI Gateway, MCP Gateway
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AI gateway governance is becoming the new identity control plane for agent stacks. When enterprises run multiple model families and multiple harnesses, the security boundary shifts from the agent runtime to the shared path that brokers identity, routing, and policy. That means the most useful controls are no longer embedded inside individual agents but applied at the layer every request must cross. Practitioners should treat this as a governance redesign, not a tooling preference.
A few things that frame the scale:
- Claude Code-assisted commits leaked secrets at a rate of 3.2%, more than double the human-only baseline of 1.5%, with peaks reaching 31 secrets per 1,000 commits in August 2025, according to the State of Secrets Sprawl 2026.
A question worth separating out:
Q: What breaks when agent tool access is not mediated through a gateway?
A: Tool exposure becomes a flat capability set instead of a bounded decision surface. That increases the chance that the agent will call systems it does not need, chain actions across services without review, or leave security teams unable to prove which tools were used in a session. Gateway mediation is what makes the trail visible.
👉 Read our full editorial: AI gateway governance sets the boundary for agent harness access