simulate_eviction

THE RISK

High Risk

Why simulate_eviction needs a policy

This tool actively triggers a simulated eviction event on a live Azure Spot VM, which is an external operation with real effects on a running compute resource. While described as a 'simulation for testing', it still executes an action against an Azure resource (interrupting/terminating a Spot VM), making it Execute category.

From the tool's definition 'Simulate eviction of a Spot VM for testing application resilience' — triggers an external operation (eviction simulation) on an Azure Spot VM

Documented attack patterns abuse exactly the kind of access simulate_eviction gives an agent:

POLICY

How to control simulate_eviction

PolicyLayer is an MCP gateway — it sits between your AI agents and Azure Pricing MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for simulate_eviction:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "simulate_eviction": {
      "limits": [
        {
          "counter": "simulate_eviction_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

simulate_eviction stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Azure Pricing MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in Azure Pricing MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about simulate_eviction

What does the simulate_eviction tool do? +

Simulate eviction of a Spot VM for testing application resilience. Requires Azure authentication with. It is categorised as a Execute tool in the Azure Pricing MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on simulate_eviction? +

Register the Azure Pricing MCP Server MCP server in PolicyLayer and add a rule for simulate_eviction: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Azure Pricing MCP Server. Nothing to install.

What risk level is simulate_eviction? +

simulate_eviction is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit simulate_eviction? +

Yes. Add a rate_limit block to the simulate_eviction rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block simulate_eviction completely? +

Set action: deny in the PolicyLayer policy for simulate_eviction. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides simulate_eviction? +

simulate_eviction is provided by the Azure Pricing MCP Server MCP server (msftnadavbh/azurepricingmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Azure Pricing MCP Server tool call.

Start from Azure Pricing MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →