# gbrain_think

Run multi-hop synthesis across wiki pages. Produces a cited answer

Agent View of the PolicyLayer registry record for `gbrain_think`. HTML page: https://policylayer.com/tools/agent-store/gbrain-think

## Facts

- Tool: `gbrain_think`
- Server: Agent Store (`chrisluersen/agent-store`) — https://policylayer.com/tools/agent-store.md
- Homepage: https://github.com/chrisluersen/agent-store
- 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": "gbrain_think",
    "arguments": {}
  }
}
```

## Why gbrain_think is rated High

While 'gbrain_think' retrieves and synthesizes data from existing wiki pages (suggesting Read-like properties), the explicit action verb 'Run' combined with the complexity of 'multi-hop synthesis' indicates code execution of an algorithm or query engine. This crosses into Execute territory.

From the tool's own definition: "Tool performs 'multi-hop synthesis' operations across wiki pages, which involves executing a defined computational workflow. The description indicates active processing ('Run', 'Produces') rather than passive retrieval."

## Use case

AI agents invoke gbrain_think to trigger actions in Agent Store. 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 Agent Store:

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

## Other tools on Agent Store (18)

- `fleet_dispatch` — Execute — https://policylayer.com/tools/agent-store/fleet-dispatch.md
- `gbrain_query` — Execute — https://policylayer.com/tools/agent-store/gbrain-query.md
- `reindex_wiki` — Execute — https://policylayer.com/tools/agent-store/reindex-wiki.md
- `file_synthesis` — Other — https://policylayer.com/tools/agent-store/file-synthesis.md
- `suggest_edges` — Other — https://policylayer.com/tools/agent-store/suggest-edges.md
- `find_related` — Read — https://policylayer.com/tools/agent-store/find-related.md
- `fleet_ping` — Read — https://policylayer.com/tools/agent-store/fleet-ping.md
- `gbrain_brain_stats` — Read — https://policylayer.com/tools/agent-store/gbrain-brain-stats.md
- `gbrain_doctor` — Read — https://policylayer.com/tools/agent-store/gbrain-doctor.md
- `gbrain_get_page` — Read — https://policylayer.com/tools/agent-store/gbrain-get-page.md
- `gbrain_list_pages` — Read — https://policylayer.com/tools/agent-store/gbrain-list-pages.md
- `gbrain_search` — Read — https://policylayer.com/tools/agent-store/gbrain-search.md
- `lint_wiki` — Read — https://policylayer.com/tools/agent-store/lint-wiki.md
- `list_wiki_pages` — Read — https://policylayer.com/tools/agent-store/list-wiki-pages.md
- `read_wiki_page` — Read — https://policylayer.com/tools/agent-store/read-wiki-page.md
- `search_wiki` — Read — https://policylayer.com/tools/agent-store/search-wiki.md
- `synthesize_answer` — Read — https://policylayer.com/tools/agent-store/synthesize-answer.md
- `wiki_stats` — Read — https://policylayer.com/tools/agent-store/wiki-stats.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`

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