# gribstream_list_parameters

NO AUTH / PUBLIC / READ-ONLY. Lists parameter summaries for one dataset. Use this before selecting exact case-sensitive parameter codes. This tool does not query weather values and cannot return forecast data.

Agent View of the PolicyLayer registry record for `gribstream_list_parameters`. HTML page: https://policylayer.com/tools/com-gribstream-mcp/gribstream-list-parameters

## Facts

- Tool: `gribstream_list_parameters`
- Server: GribStream MCP (`https://gribstream.com/mcp`) — https://policylayer.com/tools/com-gribstream-mcp.md
- Homepage: https://github.com/GribStream/gribstream-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 1 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `dataset` | string | yes | Dataset code, for example ifsoper. |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "gribstream_list_parameters",
    "arguments": {
      "dataset": "<dataset>"
    }
  }
}
```

## Why gribstream_list_parameters is rated Low

This tool retrieves and lists metadata about available parameters for a dataset without side effects, authentication barriers, or access to actual weather forecast data. It is a pure discovery/query operation with minimal blast radius if misused—an AI agent querying this tool cannot cause data loss, modify state, execute code, or commit financial transactions.

From the tool's own definition: "Tool description explicitly states 'NO AUTH / PUBLIC / READ-ONLY' and 'Lists parameter summaries' and 'cannot return forecast data'. The name 'list_parameters' indicates a retrieval operation."

## Use case

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

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "gribstream_list_parameters": {}
  }
}
```

## Other tools on GribStream MCP (11)

- `gribstream_build_runs_request` — Execute — https://policylayer.com/tools/com-gribstream-mcp/gribstream-build-runs-request.md
- `gribstream_build_timeseries_request` — Execute — https://policylayer.com/tools/com-gribstream-mcp/gribstream-build-timeseries-request.md
- `gribstream_get_dataset` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-get-dataset.md
- `gribstream_get_expression_reference` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-get-expression-reference.md
- `gribstream_get_parameter` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-get-parameter.md
- `gribstream_list_datasets` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-list-datasets.md
- `gribstream_list_shared_parameters` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-list-shared-parameters.md
- `gribstream_query_runs` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-query-runs.md
- `gribstream_query_timeseries` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-query-timeseries.md
- `gribstream_resolve_shared_parameter` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-resolve-shared-parameter.md
- `gribstream_validate_request` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-validate-request.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=com-gribstream-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-gribstream-mcp