# gribstream_list_shared_parameters

NO AUTH / PUBLIC / READ-ONLY. Lists normalized shared parameter presets that can map one logical signal across datasets. This tool does not query weather values and cannot return forecast data.

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

## Facts

- Tool: `gribstream_list_shared_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: 2
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `dataset` | object | no | Optional dataset code or list of dataset codes to filter supported shared parameters. |
| `dataset_mode` | string | no | Whether every listed dataset must support the preset or any one may support it. |

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_shared_parameters",
    "arguments": {}
  }
}
```

## Why gribstream_list_shared_parameters is rated Low

This tool retrieves and lists parameter presets without querying actual data, modifying state, executing code, or producing destructive/financial effects. It is a straightforward data retrieval operation with minimal blast radius if misused by an AI agent.

From the tool's own definition: "Tool description explicitly states 'NO AUTH / PUBLIC / READ-ONLY' and 'Lists normalized shared parameter presets'. It 'does not query weather values and cannot return forecast data', confirming read-only retrieval with no side effects."

## Use case

AI agents call gribstream_list_shared_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_shared_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_parameters` — Read — https://policylayer.com/tools/com-gribstream-mcp/gribstream-list-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