gcp_appengine_list_versions

List versions of an App Engine service

SERVERGCP MCP Server SOURCEahmedselimmansor-ctrl/gcp_mcp_server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-appengine-list-versions.md

WHAT IT DOES

What gcp_appengine_list_versions does on GCP MCP Server

AI agents call gcp_appengine_list_versions to retrieve information from GCP MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why gcp_appengine_list_versions is rated Low

This tool queries and retrieves metadata about App Engine service versions. It performs a read-only operation that returns existing data without creating, modifying, deleting, or executing anything. The blast radius of misuse is minimal—an attacker would only gain visibility into deployed versions, which is reconnaissance-level risk. Confidence is high given the clear 'list' operation semantics.

From the tool's definition Tool name contains 'list' and description states 'List versions of an App Engine service' — a purely retrieval operation with no modification capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs gcp_appengine_list_versions safely

PolicyLayer is an MCP gateway: it sits between your AI agents and GCP MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For gcp_appengine_list_versions, this is the rule to start with:

gcp_appengine_list_versions Allowed

gcp_appengine_list_versions is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gcp_appengine_list_versions": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect GCP MCP Server, apply this rule, and every gcp_appengine_list_versions call is checked against it from then on.

FAQ

Questions about gcp_appengine_list_versions

What does the gcp_appengine_list_versions tool do? +

List versions of an App Engine service. It is categorised as a Read tool in the GCP MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on gcp_appengine_list_versions? +

Register the GCP MCP Server MCP server in PolicyLayer and add a rule for gcp_appengine_list_versions: 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 GCP MCP Server. Nothing to install.

What risk level is gcp_appengine_list_versions? +

gcp_appengine_list_versions is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit gcp_appengine_list_versions? +

Yes. Add a rate_limit block to the gcp_appengine_list_versions 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 gcp_appengine_list_versions completely? +

Set action: deny in the PolicyLayer policy for gcp_appengine_list_versions. 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 gcp_appengine_list_versions? +

gcp_appengine_list_versions is provided by the GCP MCP Server MCP server (ahmedselimmansor-ctrl/gcp_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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