# mmp_update

A write tool on the Pypi:dense Knowledge MCP server.

Agent View of the PolicyLayer registry record for `mmp_update`. HTML page: https://policylayer.com/tools/dense-knowledge-mcp/mmp-update

## Facts

- Tool: `mmp_update`
- Server: Pypi:dense Knowledge (`Lucky44k/dense-knowledge-mcp`) — https://policylayer.com/tools/dense-knowledge-mcp.md
- Homepage: https://github.com/Lucky44k/dense-knowledge-mcp
- Risk category: Write (Medium risk)
- Registry record: grade B, 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": "mmp_update",
    "arguments": {}
  }
}
```

## Why mmp_update is rated Medium

The tool modifies existing data within the knowledge store reversibly (fitting Write category). Severity is medium because the blast radius depends on what knowledge entries are updated—an agent could corrupt or mislead stored information, but the append-only architecture suggests this may be constrained.

From the tool's own definition: "Tool name 'mmp_update' indicates modification of existing data. Server context describes 'append-only knowledge storage', and sibling tools include read (mmp_read, mmp_search), create (mmp_create), deprecate (mmp_deprecate), and list (mmp_list) operations."

## Use case

AI agents use mmp_update to create or update resources in Pypi:dense Knowledge, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pypi:dense Knowledge environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "mmp_update": {
      "limits": [
        {
          "counter": "mmp_update_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Pypi:dense Knowledge (7)

- `mmp_deprecate` — Read — https://policylayer.com/tools/dense-knowledge-mcp/mmp-deprecate.md
- `mmp_list` — Read — https://policylayer.com/tools/dense-knowledge-mcp/mmp-list.md
- `mmp_open` — Read — https://policylayer.com/tools/dense-knowledge-mcp/mmp-open.md
- `mmp_read` — Read — https://policylayer.com/tools/dense-knowledge-mcp/mmp-read.md
- `mmp_search` — Read — https://policylayer.com/tools/dense-knowledge-mcp/mmp-search.md
- `mmp_validate` — Read — https://policylayer.com/tools/dense-knowledge-mcp/mmp-validate.md
- `mmp_create` — Write — https://policylayer.com/tools/dense-knowledge-mcp/mmp-create.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=dense-knowledge-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dense-knowledge-mcp