# roam_datomic_query

Execute a custom Datomic query on the Roam graph for advanced data retrieval beyond the available search tools. This provides direct access to Roam\

Agent View of the PolicyLayer registry record for `roam_datomic_query`. HTML page: https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-datomic-query

## Facts

- Tool: `roam_datomic_query`
- Server: Roam Research (`2b3pro/roam-research-mcp`) — https://policylayer.com/tools/2b3pro-roam-research-mcp.md
- Homepage: https://github.com/2b3pro/roam-research-mcp
- Risk category: Execute (High risk)
- Registry record: grade D, 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": "roam_datomic_query",
    "arguments": {}
  }
}
```

## Why roam_datomic_query is rated High

This tool executes arbitrary Datomic queries directly against the Roam graph database. While described as 'data retrieval,' executing custom queries with direct database access could include destructive operations (e.g., retractions in Datomic). The 'custom query' and 'direct access' nature elevates severity since an AI agent could craft queries with unintended side effects.

From the tool's own definition: "'Execute a custom Datomic query on the Roam graph' and 'provides direct access to Roam'"

## Use case

AI agents invoke roam_datomic_query to trigger actions in Roam Research. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "roam_datomic_query": {
      "limits": [
        {
          "counter": "roam_datomic_query_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Roam Research (21)

- `roam_fetch_block` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-fetch-block.md
- `roam_fetch_page_by_title` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-fetch-page-by-title.md
- `roam_fetch_page_full_view` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-fetch-page-full-view.md
- `roam_find_pages_modified_today` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-find-pages-modified-today.md
- `roam_get_subpages` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-get-subpages.md
- `roam_markdown_cheatsheet` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-markdown-cheatsheet.md
- `roam_recall` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-recall.md
- `roam_search_block_refs` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-search-block-refs.md
- `roam_search_by_date` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-search-by-date.md
- `roam_search_by_status` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-search-by-status.md
- `roam_search_by_text` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-search-by-text.md
- `roam_search_for_tag` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-search-for-tag.md
- `roam_search_hierarchy` — Read — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-search-hierarchy.md
- `roam_add_todo` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-add-todo.md
- `roam_create_outline` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-create-outline.md
- `roam_create_page` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-create-page.md
- `roam_import_markdown` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-import-markdown.md
- `roam_move_block` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-move-block.md
- `roam_remember` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-remember.md
- `roam_rename_page` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-rename-page.md
- `roam_update_page_markdown` — Write — https://policylayer.com/tools/2b3pro-roam-research-mcp/roam-update-page-markdown.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=2b3pro-roam-research-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/2b3pro-roam-research-mcp