SECURITY ATLAS / EVALUATION BRIEF SentinelOne Prompt AI Agent Security Research reviewed: 2026-10-18 https://atlasofsecurity.com/landscape/vendors/sentinelone-prompt-agent-security/ THE ATLAS TAKE SentinelOne Prompt Agentic AI Security is worth examining when agent discovery, workflow visibility and runtime governance need to be assessed together. The current product page describes that purpose, while the March release places it within a broader AI security program. Atlas would keep the trial scoped to agent interactions and the integration actually installed. Workforce AI controls and Purple AI are different jobs. The decisive result is a correctly attributed workflow with a demonstrably effective policy at the intended point, rather than a generic platform dashboard or an announcement that leaves release state unclear. SCOPE Evaluate the agent-security offering separately from employee AI usage controls and Purple AI. Confirm the actual integration and release state. WORTH A LOOK WHEN Teams evaluating a supported agent/MCP governance path with clear application and SOC ownership. THINK TWICE WHEN The proposal assumes workforce AI usage controls or Purple AI automatically govern custom agent actions. IMPLEMENTATION 1. Confirm actual release and integration Obtain the supported agent, transport, deployment and module matrix for the tenant being evaluated. 2. Validate known workflow discovery Compare a small agent/tool roster and one complete task against the native platform records. 3. Test real enforcement Use a harmless policy violation and verify decision timing, target-side action and reversal of a mistaken restriction. OPERATING REALITY Agent environments and tool routes change quickly, so connector health and runtime policy need continuing ownership. Investigators need enough trace detail to distinguish agent, user and destination. An incorrect block also needs an application-owner recovery process, while sensitive prompts and tool records should follow deliberate retention and access decisions. COMMERCIAL CONSIDERATIONS Quote the agent-security functions and integration explicitly. Separate workforce AI, Purple AI and other SentinelOne modules, including any deployment and retained-trace costs. - Covered agent environments and selected functions - Integration/deployment and sensitive trace retention - Separate workforce/SOC products and operating support EVALUATION PLAN / PROPOSED TESTS, NOT COMPLETED RESULTS 1. Discover a known supported agent workflow Acceptance evidence: Record observed identity, tool and version context. Owner: __________ Pass criterion: __________ Observed result: __________ Evidence location: __________ 2. Deny one safe out-of-policy interaction Acceptance evidence: Verify the tool-side effect did not occur. Owner: __________ Pass criterion: __________ Observed result: __________ Evidence location: __________ 3. Repeat on a deliberately unintegrated test path Acceptance evidence: Document the coverage gap and independent resource permission. Owner: __________ Pass criterion: __________ Observed result: __________ Evidence location: __________ QUESTIONS FOR THE VENDOR - Which agent workflows are discovered automatically? - Where is this policy decision enforced? - Which capabilities require additional licensing? EVIDENCE GAPS Public evidence limitation: Two accessible official sources describe product scope and release context. A detailed versioned deployment/support reference for this agent-security offering was not available in the reviewed sources. - Atlas has not independently tested discovery or runtime-prevention efficacy. - Obtain release-specific supported integrations, processing locations and enforcement failure behavior. SOURCES SentinelOne: Agentic AI Security control points and scope (Product information) https://www.sentinelone.com/platform/prompt-security-agentic-ai-security/ SentinelOne: March 2026 AI security release (Product information) https://s28.q4cdn.com/399982429/files/doc_downloads/2026/03/RSAC-AI-Security-Release.pdf Use synthetic fixtures in an authorized environment. Agree rollback and acceptance criteria before enforcement. Documentation research and Atlas analysis. Independent hands-on effectiveness, effort, and complete price remain unassessed.