# hello_gcf

A other tool on the ChukMCPServer MCP server.

Agent View of the PolicyLayer registry record for `hello_gcf`. HTML page: https://policylayer.com/tools/ibm-chuk-mcp-server/hello-gcf

## Facts

- Tool: `hello_gcf`
- Server: ChukMCPServer (`ibm/chuk-mcp-server`) — https://policylayer.com/tools/ibm-chuk-mcp-server.md
- Homepage: https://github.com/IBM/chuk-mcp-server
- Risk category: Other (Low risk)
- Registry record: grade B, 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": "hello_gcf",
    "arguments": {}
  }
}
```

## Why hello_gcf is rated Low

The tool name suggests it is a simple greeting function (like its siblings 'hello', 'hello_azure', 'hello_lambda') deployed on Google Cloud Functions. Greeting/echo-type tools typically just return a static or parameterized string with no side effects. However, the description is empty, reducing confidence. Given the pattern of sibling tools, this is most likely a Read or Other category operation with minimal risk.

From the tool's own definition: "Tool name is 'hello_gcf' with an empty description. Based on sibling tools like 'hello', 'hello_azure', 'hello_lambda', this appears to be a greeting/hello function targeting Google Cloud Functions."

## Use case

AI agents call hello_gcf as a supporting operation in ChukMCPServer workflows.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "hello_gcf": {
      "limits": [
        {
          "counter": "hello_gcf_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on ChukMCPServer (12)

- `multiply` — Execute — https://policylayer.com/tools/ibm-chuk-mcp-server/multiply.md
- `add` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/add.md
- `advanced_tool` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/advanced-tool.md
- `bench_add` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/bench-add.md
- `bench_echo` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/bench-echo.md
- `echo` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/echo.md
- `hello` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/hello.md
- `hello_azure` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/hello-azure.md
- `hello_lambda` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/hello-lambda.md
- `universal_tool` — Other — https://policylayer.com/tools/ibm-chuk-mcp-server/universal-tool.md
- `get_env` — Read — https://policylayer.com/tools/ibm-chuk-mcp-server/get-env.md
- `safe_lookup` — Read — https://policylayer.com/tools/ibm-chuk-mcp-server/safe-lookup.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`

---

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