AI agents call list_app_types to retrieve information from Myvtp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays metadata about the VTP platform's supported frameworks (Node.js, static sites, etc.). It has no side effects, does not execute code, does not modify data, and does not move money. It is purely informational—a READ operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'list_app_types' and description 'List supported app types for deployment' and 'see what frameworks VTP supports' indicate a query operation that retrieves information about supported deployment options without modifying or executing anything.
Attacks that exploit this kind of access
List supported app types for deployment. Use this to see what frameworks VTP supports (Node.js, static). It is categorised as a Read tool in the Myvtp MCP Server, which means it retrieves data without modifying state.
Register the Myvtp MCP server in PolicyLayer and add a rule for list_app_types: 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 Myvtp. Nothing to install.
list_app_types is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_app_types 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.
Set action: deny in the PolicyLayer policy for list_app_types. 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.
list_app_types is provided by the Myvtp MCP server (myvtp/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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