# kb_list

List recent entries with optional filters by kind, tag, or date.

Agent View of the PolicyLayer registry record for `kb_list`. HTML page: https://policylayer.com/tools/0x67108864-persistent-kb-mcp/kb-list

## Facts

- Tool: `kb_list`
- Server: Persistent Kb (`0x67108864/persistent-kb-mcp`) — https://policylayer.com/tools/0x67108864-persistent-kb-mcp.md
- Homepage: https://github.com/0x67108864/persistent-kb-mcp
- Risk category: Read (Low risk)
- Registry record: grade D, 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": "kb_list",
    "arguments": {}
  }
}
```

## Why kb_list is rated Low

The tool retrieves and displays knowledge base entries with optional filtering. It performs no side effects, creates no new data, executes no code, and does not delete or move money. It is purely a read operation to query and view stored information.

From the tool's own definition: "Tool name is 'kb_list' and description states 'List recent entries with optional filters by kind, tag, or date' — this is a query/retrieval operation that returns data without modifying or deleting it."

## Use case

AI agents call kb_list to retrieve information from Persistent Kb 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 Persistent Kb:

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

## Other tools on Persistent Kb (4)

- `kb_search` — Read — https://policylayer.com/tools/0x67108864-persistent-kb-mcp/kb-search.md
- `kb_show` — Read — https://policylayer.com/tools/0x67108864-persistent-kb-mcp/kb-show.md
- `kb_add` — Write — https://policylayer.com/tools/0x67108864-persistent-kb-mcp/kb-add.md
- `kb_tag` — Write — https://policylayer.com/tools/0x67108864-persistent-kb-mcp/kb-tag.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=0x67108864-persistent-kb-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0x67108864-persistent-kb-mcp