gcloud_run_trigger · Gcloud MCP: Risk & Policy

WHAT IT DOES

What gcloud_run_trigger does on Gcloud

AI agents invoke gcloud_run_trigger to trigger actions in Gcloud. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why gcloud_run_trigger needs a policy

This tool executes a build process in Google Cloud, which runs code and triggers external operations. While not immediately destructive or financial, it has significant blast radius: a malicious agent could trigger resource-intensive builds, consume quotas, incur costs, or deploy malicious code.

From the tool's definition Tool description explicitly states 'Manually trigger a Cloud Build' and warns 'This creates a new build — use with care.' The tool initiates external operations (build execution) whose effects depend on which trigger/build configuration is invoked.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gcloud_run_trigger Rate-limited

gcloud_run_trigger 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Gcloud, so you can run agents against it safely.

FAQ

Questions about gcloud_run_trigger

What does the gcloud_run_trigger tool do? +

Manually trigger a Cloud Build. Returns the build ID of the triggered build. WARNING: This creates a new build — use with care. It is categorised as a Execute tool in the Gcloud MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on gcloud_run_trigger? +

Register the Gcloud MCP server in PolicyLayer and add a rule for gcloud_run_trigger: 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 Gcloud. Nothing to install.

What risk level is gcloud_run_trigger? +

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

Can I rate-limit gcloud_run_trigger? +

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

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

gcloud_run_trigger is provided by the Gcloud MCP server (prmichaelsen/gcloud-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.