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Sanctum vs Guardrails: Chat Safety vs Execution Control

Guardrails filter what models say. Runtime trust protects what they do. When to use both — and why autonomous systems need an action boundary.

May 17, 20266 min read

Teams often ask: we already have guardrails — why Sanctum? Because guardrails protect conversation. Runtime trust protects execution.

Guardrails (input/output)

  • Jailbreak and toxicity filters on prompts and replies
  • PII redaction in chat
  • Structured output validation

Sanctum Runtime (action layer)

  • Intercepts tool calls, API writes, robot commands
  • Policy: approve · verify · block per action type
  • Signed action tokens, blast-radius scoring, audit for SOC2 / NIST AI RMF

Use both

Moderation on chat; Sanctum on anything that changes the world. That stack is the production pattern for agentic SaaS, robotics integrators, and enterprise automation.

Security overview · Runtime trust layer

Guides: agentic AI risk · MCP security · runtime authorization · HITL approvals · coding agents · get startedMore: all posts · AI trust layer · open Sanctum Console

Give every agent action a trust boundary.

Start with Connect Agent, keep the SDK path for deeper fleets, and prove exactly what was approved, blocked, or contained.