# signal_friction

Send an ANONYMOUS, content-free signal when an LMCP tool fails, returns nothing useful, the user seems frustrated, or you could not accomplish what they asked. Helps the LMCP team find and fix the roughest spots. Send ONLY the category + the tool name — NEVER the user's request, message/email content, account names, or any personal data. No confirmation needed: this is anonymous (categories only) and respects the user's opt-out.

Agent View of the PolicyLayer registry record for `signal_friction`. HTML page: https://policylayer.com/tools/com-local-mcp-local-mcp/signal-friction

## Facts

- Tool: `signal_friction`
- Server: Local (`local-mcp`) — https://policylayer.com/tools/com-local-mcp-local-mcp.md
- Install: `npx -y local-mcp`
- Homepage: https://github.com/lanchuske/local-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 4 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `attempt_count` | integer | no | How many times this was attempted (optional). |
| `error_category` | string | no | Category of what went wrong (optional). |
| `tool_attempted` | string | no | Name of the LMCP tool involved (e.g. list_emails). Optional. |
| `friction_signal` | string | yes | What kind of friction you observed. |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "signal_friction",
    "arguments": {
      "friction_signal": "<friction_signal>"
    }
  }
}
```

## Why signal_friction is rated Medium

The tool creates data (a signal/feedback record) on a remote system. It is reversible (signals can be discarded or logged without permanent damage) and contains no personal data per design ('NEVER the user's request, message/email content, account names, or any personal data').

From the tool's own definition: "Tool sends/submits a signal: 'Send an ANONYMOUS, content-free signal'. This is a network transmission that creates a log entry or record on the LMCP team's systems."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Local (233)

- `delete_calendar_event` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/delete-calendar-event.md
- `delete_reminder` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/delete-reminder.md
- `delete_reminder_list` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/delete-reminder-list.md
- `m365_delete_event` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/m365-delete-event.md
- `onedrive_delete_file` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/onedrive-delete-file.md
- `recipe_delete` — Destructive — https://policylayer.com/tools/com-local-mcp-local-mcp/recipe-delete.md
- `chrome_click` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-click.md
- `chrome_evaluate_js` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-evaluate-js.md
- `chrome_fill_form` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-fill-form.md
- `chrome_go_back` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-go-back.md
- `chrome_navigate` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-navigate.md
- `chrome_type` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-type.md
- `chrome_wait_for` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/chrome-wait-for.md
- `nordvpn_diagnose` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/nordvpn-diagnose.md
- `notion_open_page` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/notion-open-page.md
- `recipe_run` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/recipe-run.md
- `run_diagnostics` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/run-diagnostics.md
- `run_terminal_command` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/run-terminal-command.md
- `safari_click` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-click.md
- `safari_evaluate_js` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-evaluate-js.md
- `safari_fill_form` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-fill-form.md
- `safari_go_back` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-go-back.md
- `safari_navigate` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-navigate.md
- `safari_query_selector_all` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-query-selector-all.md
- `safari_type` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-type.md
- `safari_wait_for` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/safari-wait-for.md
- `screen_record_start` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/screen-record-start.md
- `screen_record_stop` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/screen-record-stop.md
- `setup_install` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/setup-install.md
- `ui_click` — Execute — https://policylayer.com/tools/com-local-mcp-local-mcp/ui-click.md
- …and 203 more: https://policylayer.com/tools/com-local-mcp-local-mcp.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=com-local-mcp-local-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-local-mcp-local-mcp