SAIL 2.0

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Build - AI Security Posture Management

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Posture Drift / Configuration Drift Over Time

3.18

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Posture Drift / Configuration Drift Over Time

sail
3.18
Risk

Posture Drift / Configuration Drift Over Time

Description

Agent posture set at build is not maintained โ€” tools, scopes, identities, or memory configurations expand silently as the agent evolves, eroding the original posture floor.

Example

An agent built with three approved tools accumulates eleven over six months as developers add MCP servers ad-hoc; nobody re-reviews the posture.

Assets Affected

AI Agent

Agent Config

Tool

MCP Server

Agent Identity

Mitigation
  • Periodic posture re-baselining
  • automated drift detection comparing current posture to the build-time floor
  • alert on new tools, scopes, or MCPs added
  • require approval for posture changes.
Standards Mapping
  • ISO: Clause 8.2, A.6.2.6
  • OWASP agentic: ASI10
  • EU AI Act: Art. 9, Art. 72
  • DASF: Algorithms 5.2, Agents-MCP Client 13.35
  • AIUC-1: E004, E008