get-custom-api-response-properties

THE RISK

Low Risk

Why get-custom-api-response-properties needs a policy

This tool queries metadata about Custom API response properties without creating, modifying, deleting, or executing any code. It is purely informational retrieval from the PowerPlatform/Dataverse system. No data is altered and no external operations are triggered. The blast radius of misuse is minimal—an agent could over-query or discover sensitive API structures, but cannot harm or change systems.

From the tool's definition Tool name and description indicate 'List response properties' - a retrieval operation with no modification or side effects. The verb 'get' and action 'list' are characteristic of Read operations.

Documented attack patterns abuse exactly the kind of access get-custom-api-response-properties gives an agent:

POLICY

How to control get-custom-api-response-properties

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 get-custom-api-response-properties:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get-custom-api-response-properties": {}
  }
}

get-custom-api-response-properties is read-only, so it stays allowed — but 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.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get-custom-api-response-properties

What does the get-custom-api-response-properties tool do? +

List response properties for a Custom API. It is categorised as a Read tool in the PowerPlatform MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-custom-api-response-properties? +

Register the PowerPlatform MCP server in PolicyLayer and add a rule for get-custom-api-response-properties: 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 get-custom-api-response-properties? +

get-custom-api-response-properties is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get-custom-api-response-properties? +

Yes. Add a rate_limit block to the get-custom-api-response-properties 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 get-custom-api-response-properties completely? +

Set action: deny in the PolicyLayer policy for get-custom-api-response-properties. 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 get-custom-api-response-properties? +

get-custom-api-response-properties 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 →