# cern-search-by-experiment

Search CERN Open Data records scoped to a specific experiment (CMS, ATLAS, LHCb, ALICE).

Agent View of the PolicyLayer registry record for `cern-search-by-experiment`. HTML page: https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/cern-search-by-experiment

## Facts

- Tool: `cern-search-by-experiment`
- Server: Meta Data Mcp (`pypi:meta-data-mcp`) — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp.md
- Install: `npx -y pypi:meta-data-mcp`
- Homepage: https://github.com/derekslinz/meta-data-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "cern-search-by-experiment",
    "arguments": {}
  }
}
```

## Why cern-search-by-experiment is rated Low

This tool retrieves data from CERN's public open data repository by querying records filtered by experiment type. It has no side effects, cannot modify data, and poses minimal risk if misused by an AI agent—worst case being information retrieval from already-public sources. This is a straightforward Read operation.

From the tool's own definition: "Tool name contains 'search' and description states 'Search CERN Open Data records'. The action is querying/retrieving publicly available open data with no modification, creation, deletion, or execution of code."

## Use case

AI agents call cern-search-by-experiment to retrieve information from Meta Data 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 Meta Data Mcp:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "cern-search-by-experiment": {}
  }
}
```

## Other tools on Meta Data Mcp (395)

- `hackernews-new-stories` — Execute — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/hackernews-new-stories.md
- `opendata_plugins_create` — Execute — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/opendata-plugins-create.md
- `ovapi-stop-departures` — Execute — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ovapi-stop-departures.md
- `overpass-query` — Execute — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/overpass-query.md
- `ssllabs-analyze` — Execute — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ssllabs-analyze.md
- `wikidata-sparql` — Execute — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/wikidata-sparql.md
- `arxiv-get-paper` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/arxiv-get-paper.md
- `arxiv-query` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/arxiv-query.md
- `arxiv-search-by-author` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/arxiv-search-by-author.md
- `arxiv-search-by-category` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/arxiv-search-by-category.md
- `arxiv-search-by-title` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/arxiv-search-by-title.md
- `au-data-gov-get-dataset` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/au-data-gov-get-dataset.md
- `au-data-gov-get-organization` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/au-data-gov-get-organization.md
- `au-data-gov-list-groups` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/au-data-gov-list-groups.md
- `au-data-gov-list-organizations` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/au-data-gov-list-organizations.md
- `au-data-gov-list-tags` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/au-data-gov-list-tags.md
- `au-data-gov-search-datasets` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/au-data-gov-search-datasets.md
- `awc-metar` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/awc-metar.md
- `awc-station` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/awc-station.md
- `awc-taf` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/awc-taf.md
- `ca-open-gov-get-dataset` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-get-dataset.md
- `ca-open-gov-get-organization` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-get-organization.md
- `ca-open-gov-list-groups` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-list-groups.md
- `ca-open-gov-list-licenses` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-list-licenses.md
- `ca-open-gov-list-organizations` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-list-organizations.md
- `ca-open-gov-list-tags` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-list-tags.md
- `ca-open-gov-search-datasets` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/ca-open-gov-search-datasets.md
- `cbs-get-metadata` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/cbs-get-metadata.md
- `cbs-get-typed-dataset` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/cbs-get-typed-dataset.md
- `cbs-list-tables` — Read — https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp/cbs-list-tables.md
- …and 365 more: https://policylayer.com/tools/io-github-derekslinz-meta-data-mcp.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=io-github-derekslinz-meta-data-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-derekslinz-meta-data-mcp