create-web-resource

THE RISK

Medium Risk

Why create-web-resource needs a policy

This tool creates new artifacts in a PowerPlatform environment. While the action is reversible (web resources can be updated or deleted later), it modifies the state of the system by introducing new code-based resources. The severity is high because an AI agent could inadvertently create malicious web resources, inject code into the environment, or create resources that interfere with legitimate business logic.

From the tool's definition Tool creates a new web resource in a PowerPlatform environment. The description explicitly states it 'Create[s] a new web resource', which is a reversible write operation.

Documented attack patterns abuse exactly the kind of access create-web-resource gives an agent:

POLICY

How to control create-web-resource

PolicyLayer is an MCP gateway — it sits between your AI agents and PowerPlatform MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for create-web-resource:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create-web-resource": {
      "limits": [
        {
          "counter": "create-web-resource_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create-web-resource stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 66 PowerPlatform MCP tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create-web-resource

What does the create-web-resource tool do? +

Create a new web resource in a PowerPlatform environment. Content must be base64-encoded. It is categorised as a Write tool in the PowerPlatform MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create-web-resource? +

Register the PowerPlatform MCP server in PolicyLayer and add a rule for create-web-resource: 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 PowerPlatform MCP. Nothing to install.

What risk level is create-web-resource? +

create-web-resource is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create-web-resource? +

Yes. Add a rate_limit block to the create-web-resource 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 create-web-resource completely? +

Set action: deny in the PolicyLayer policy for create-web-resource. 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 create-web-resource? +

create-web-resource is provided by the PowerPlatform MCP server (michsob/powerplatform-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every PowerPlatform MCP tool call.

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

CHECK YOUR STACK →