# mcp_update

Update an MCP server

Agent View of the PolicyLayer registry record for `mcp_update`. HTML page: https://policylayer.com/tools/1mcp-app-agent/mcp-update

## Facts

- Tool: `mcp_update`
- Server: 1MCP Server (`1mcp-app/agent`) — https://policylayer.com/tools/1mcp-app-agent.md
- Homepage: https://github.com/1mcp-app/agent
- Risk category: Write (Medium risk)
- Registry record: grade F, 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": "mcp_update",
    "arguments": {}
  }
}
```

## Why mcp_update is rated Medium

The tool modifies MCP server state, which could alter behavior, dependencies, or configurations. While updates are typically reversible (can be downgraded), the high blast radius justifies 'high' severity: a malicious update could inject malicious MCP servers into the aggregator or break connectivity for all clients relying on this unified server.

From the tool's own definition: "Tool name 'mcp_update' and description 'Update an MCP server' indicate modification of existing MCP server configurations or state. This is a reversible write operation on system-critical infrastructure."

## Use case

AI agents use mcp_update to create or update resources in 1MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 1MCP Server environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches 1MCP Server:

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

## Other tools on 1MCP Server (16)

- `mcp_uninstall` — Destructive — https://policylayer.com/tools/1mcp-app-agent/mcp-uninstall.md
- `mcp_install` — Execute — https://policylayer.com/tools/1mcp-app-agent/mcp-install.md
- `mcp_reload` — Execute — https://policylayer.com/tools/1mcp-app-agent/mcp-reload.md
- `tool_invoke` — Execute — https://policylayer.com/tools/1mcp-app-agent/tool-invoke.md
- `mcp_info` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-info.md
- `mcp_list` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-list.md
- `mcp_registry_info` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-registry-info.md
- `mcp_registry_list` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-registry-list.md
- `mcp_registry_status` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-registry-status.md
- `mcp_search` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-search.md
- `mcp_status` — Read — https://policylayer.com/tools/1mcp-app-agent/mcp-status.md
- `tool_list` — Read — https://policylayer.com/tools/1mcp-app-agent/tool-list.md
- `tool_schema` — Read — https://policylayer.com/tools/1mcp-app-agent/tool-schema.md
- `mcp_disable` — Write — https://policylayer.com/tools/1mcp-app-agent/mcp-disable.md
- `mcp_edit` — Write — https://policylayer.com/tools/1mcp-app-agent/mcp-edit.md
- `mcp_enable` — Write — https://policylayer.com/tools/1mcp-app-agent/mcp-enable.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=1mcp-app-agent · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/1mcp-app-agent