Runtime enforcement should come first wherever agents can touch production systems. IAM cleanup matters, but it will not stop a dynamic agent from overreaching inside an approved session. The immediate priority is to prevent sensitive data exposure and state changes at the point of action, then align the broader identity model behind it.
Why Runtime Enforcement Should Come Before Broad IAM Cleanup for MCP
For MCP-enabled environments, the immediate question is not whether identity hygiene matters, but where the control can still stop harm once an agent is already operating. runtime enforcement matters because MCP tools can be invoked inside an apparently authorised session, and broad IAM cleanup does not reliably constrain what the agent does with that access in real time. That gap is especially important in telecom environments where production impact, customer data exposure, and service disruption can follow a single overbroad action.
Current guidance suggests treating the agent execution layer as the first containment boundary. If tool access, data handling, or state-changing actions are only governed by standing permissions, the control fails precisely when autonomous behaviour becomes unpredictable. NHIMG research on MCP server security found that only 18% of deployments implement any form of access scoping for tool permissions, which shows how often the runtime layer is still undercontrolled.
In practice, many security teams discover the weakness only after an approved agent session has already touched a sensitive system, rather than through deliberate policy design.
How Runtime Enforcement Changes the Risk Model in Practice
Runtime enforcement shifts control from who can authenticate to what the agent may do at the moment of action. That distinction matters because telecom operators usually have layered environments, with orchestration tools, network management systems, customer support workflows, and data platforms all connected through delegated access. If the agent is allowed to act under a broad identity with static permissions, IAM cleanup may reduce clutter but it will not stop an oversized command, an unintended API call, or a data fetch that exceeds the original business intent.
Practitioners should think in terms of bounded execution rather than just cleaner identities. The strongest pattern is to combine short-lived credentials, explicit tool-level scoping, policy evaluation at invocation time, and logging that can prove which action was approved, denied, or constrained. For agentic systems, this is not a theoretical preference: it is the only layer that can intervene between intent and execution. OWASP’s OWASP Top 10 for Agentic Applications 2026 is useful here because it frames agent risk around unsafe autonomy, not just identity state.
- Use runtime policy to constrain tool calls, data scope, and write actions separately.
- Prefer ephemeral secrets and per-session authorisation over persistent delegated access.
- Separate read-only discovery from any production-changing operation.
- Require observability for each tool invocation so security teams can reconstruct behaviour later.
NHIMG’s OWASP Agentic Applications Top 10 reinforces the same practical point: the main failure mode is not simply bad identity records, but excessive agent capability during execution. These controls tend to break down when legacy telecom platforms only support coarse service-account permissions because the policy engine cannot intercept actions at tool granularity.
What Broad IAM Cleanup Still Needs to Fix, and Where It Can Wait
Broader IAM cleanup is still necessary, but it is the slower structural layer. It addresses excessive standing privilege, orphaned accounts, unclear ownership, and weak lifecycle control over machine identities. Tighter IAM often reduces attack surface and simplifies governance, but it also requires inventory, dependency mapping, and change management, which can take longer than organisations expect. That creates a real operational tradeoff: the cleaner the identity model, the lower the long-term exposure, but the more coordination it requires across infrastructure, application, and security teams.
Best practice is evolving, but the sequencing is clear for most environments. If MCP-connected agents can reach production systems today, runtime enforcement should be the first control to land. IAM cleanup should follow as the hardening programme that removes unnecessary standing access, shortens credential lifetime, and reduces how much trust runtime policies need to absorb. NIST’s NIST Cybersecurity Framework 2.0 is a useful governance lens, but it should not be used as a reason to delay the more immediate containment step.
One further practical signal is that IAM remediation tends to lag in environments with many service dependencies, because every permission change risks breaking an upstream workflow. In those cases, runtime enforcement provides the nearer-term protection while the identity cleanup work proceeds in parallel.
Risk and Threat Considerations
The material risk is privilege misuse through an authorised but overly capable agent session. In MCP environments, the danger is not limited to stolen credentials; it also includes legitimate access being exercised beyond the intended scope, especially where the agent can chain tool calls or reach sensitive systems through delegated trust.
Failure mechanism: Broad IAM cleanup reduces standing privilege, but it does not prevent an autonomous agent from making a harmful decision inside an active session. The recognised failure chain is excessive delegated access, insufficient tool scoping, weak runtime policy checks, and inadequate logging or approval boundaries.
Impact: The result can be sensitive data exposure, unauthorised configuration change, or production state modification before identity hygiene issues are even noticed. In telecom settings, that can translate into customer impact, outage risk, and a harder forensic record because the action looked authorised at the identity layer.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Agentic AI Top 10, OWASP Non-Human Identity Top 10 and CSA MAESTRO address the attack and risk surface, while CIS Controls v8 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Agentic AI Top 10 | A1 — Unsafe Tool Use | MCP agent tool calls can overreach at execution time. |
| Recommendation — Constrain tool execution with runtime policy and least-privilege scopes. | ||
| OWASP Non-Human Identity Top 10 | NHI-01 — Secrets and Credential Management | MCP risk often hinges on short-lived secrets and delegated access. |
| Recommendation — Replace standing credentials with ephemeral, scoped access tokens. | ||
| CSA MAESTRO | GOV-03 — Agent Governance and Oversight | The question is about controlling autonomous agent actions in production. |
| Recommendation — Define approval and enforcement points before agents can touch production. | ||
| CIS Controls v8 | 6 — Access Control Management | Broader IAM cleanup is about removing excessive and standing access. |
| Recommendation — Review and remove unnecessary access rights and dormant accounts. | ||
| NIST Zero Trust (SP 800-207) | SC-4 — Least Privilege | Runtime enforcement aligns with contextual, least-privilege access decisions. |
| Recommendation — Enforce least-privilege decisions at the moment each agent action is requested. | ||
Practitioner Guidance
What to prioritise: Put runtime controls on any MCP path that can touch production, customer data, or write-capable tooling. If the agent can act before the IAM programme is finished, treat that path as the urgent containment problem rather than waiting for a full identity refresh.
Decision rule: If the access path can change state, move data, or trigger downstream automation, enforce per-action policy and session scoping first. If the path is read-only and isolated, IAM cleanup can move ahead with less urgency.
What good looks like: Every meaningful tool invocation is constrained by policy, time-bounded, attributable, and revocable without changing the entire identity estate. The strongest signal is that security can stop harmful agent behaviour without needing to redesign the whole account model first.
Practitioner takeaway: Runtime enforcement is the control that limits damage now; IAM cleanup is the control that lowers the ceiling later. In MCP risk management, sequencing matters because autonomous action risk is about what can happen in-session, not only what identities exist on paper.
