# gcp_pubsub_publish_message

Publish a message to a Pub/Sub topic

Agent View of the PolicyLayer registry record for `gcp_pubsub_publish_message`. HTML page: https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-pubsub-publish-message

## Facts

- Tool: `gcp_pubsub_publish_message`
- Server: GCP MCP Server (`ahmedselimmansor-ctrl/gcp_mcp_server`) — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server.md
- Homepage: https://github.com/ahmedselimmansor-ctrl/GCP_MCP_server
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "gcp_pubsub_publish_message",
    "arguments": {}
  }
}
```

## Why gcp_pubsub_publish_message is rated Medium

Publishing a message to Pub/Sub creates a new message object that persists in the topic until consumed or expired. This is a write operation (data creation) with reversible effects—messages can be acknowledged and removed. It is not destructive (messages are not permanently deleted), not financial, and not arbitrary code execution.

From the tool's own definition: "Tool name 'publish_message' and description 'Publish a message to a Pub/Sub topic' indicate creation/insertion of data into a message queue system."

## Use case

AI agents use gcp_pubsub_publish_message to create or update resources in GCP MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your GCP MCP Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches GCP MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "gcp_pubsub_publish_message": {
      "limits": [
        {
          "counter": "gcp_pubsub_publish_message_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on GCP MCP Server (294)

- `gcp_agent_delete_app` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-agent-delete-app.md
- `gcp_agent_delete_data_store` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-agent-delete-data-store.md
- `gcp_agent_delete_endpoint` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-agent-delete-endpoint.md
- `gcp_agent_delete_model` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-agent-delete-model.md
- `gcp_agent_delete_reasoning_engine` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-agent-delete-reasoning-engine.md
- `gcp_appengine_delete_service` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-appengine-delete-service.md
- `gcp_appengine_delete_version` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-appengine-delete-version.md
- `gcp_ar_delete_package` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-ar-delete-package.md
- `gcp_ar_delete_repository` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-ar-delete-repository.md
- `gcp_ar_delete_version` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-ar-delete-version.md
- `gcp_bq_delete_dataset` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-bq-delete-dataset.md
- `gcp_bq_delete_table` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-bq-delete-table.md
- `gcp_compute_delete_disk` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-compute-delete-disk.md
- `gcp_compute_delete_instance` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-compute-delete-instance.md
- `gcp_compute_delete_snapshot` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-compute-delete-snapshot.md
- `gcp_compute_detach_disk` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-compute-detach-disk.md
- `gcp_dns_delete_managed_zone` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-dns-delete-managed-zone.md
- `gcp_dns_delete_record_set` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-dns-delete-record-set.md
- `gcp_firestore_delete_document` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-firestore-delete-document.md
- `gcp_functions_delete` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-functions-delete.md
- `gcp_gke_delete_cluster` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-gke-delete-cluster.md
- `gcp_gke_delete_node_pool` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-gke-delete-node-pool.md
- `gcp_iam_delete_custom_role` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-iam-delete-custom-role.md
- `gcp_iam_delete_service_account` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-iam-delete-service-account.md
- `gcp_iam_delete_service_account_key` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-iam-delete-service-account-key.md
- `gcp_iam_remove_iam_binding` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-iam-remove-iam-binding.md
- `gcp_lb_delete_backend_service` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-lb-delete-backend-service.md
- `gcp_lb_delete_forwarding_rule` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-lb-delete-forwarding-rule.md
- `gcp_lb_delete_target_pool` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-lb-delete-target-pool.md
- `gcp_logging_delete_log` — Destructive — https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server/gcp-logging-delete-log.md
- …and 264 more: https://policylayer.com/tools/ahmedselimmansor-ctrl-gcp-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=ahmedselimmansor-ctrl-gcp-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/ahmedselimmansor-ctrl-gcp-mcp-server