# conv_strip_message_signature

Replace an inbound message

Agent View of the PolicyLayer registry record for `conv_strip_message_signature`. HTML page: https://policylayer.com/tools/com-getmunin-munin/conv-strip-message-signature

## Facts

- Tool: `conv_strip_message_signature`
- Server: Munin (`https://mcp.getmunin.com/mcp`) — https://policylayer.com/tools/com-getmunin-munin.md
- Homepage: https://github.com/getmunin/munin
- Risk category: Write (Medium risk)
- Registry record: grade D, identity unverified
- Server auth posture: gated
- 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": "conv_strip_message_signature",
    "arguments": {}
  }
}
```

## Why conv_strip_message_signature is rated Medium

This tool modifies message content by removing/replacing signatures in inbound messages. It is a reversible Write operation (data can be restored or re-modified) rather than a destructive deletion. Severity is medium because it modifies communication records that users may rely on for context, and an AI agent could maliciously alter message content to obscure sender identity or create misleading conversation records.

From the tool's own definition: "Tool name indicates 'strip_message_signature' and description states 'Replace an inbound message', which describes modification of existing message data."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Munin (241)

- `analytics_revoke_tracker` — Destructive — https://policylayer.com/tools/com-getmunin-munin/analytics-revoke-tracker.md
- `analytics_rotate_tracker_key` — Destructive — https://policylayer.com/tools/com-getmunin-munin/analytics-rotate-tracker-key.md
- `bookings_cancel_booking` — Destructive — https://policylayer.com/tools/com-getmunin-munin/bookings-cancel-booking.md
- `bookings_cancel_my_booking` — Destructive — https://policylayer.com/tools/com-getmunin-munin/bookings-cancel-my-booking.md
- `cms_delete_asset` — Destructive — https://policylayer.com/tools/com-getmunin-munin/cms-delete-asset.md
- `cms_delete_collection` — Destructive — https://policylayer.com/tools/com-getmunin-munin/cms-delete-collection.md
- `cms_delete_entry` — Destructive — https://policylayer.com/tools/com-getmunin-munin/cms-delete-entry.md
- `connectors_delete_connection` — Destructive — https://policylayer.com/tools/com-getmunin-munin/connectors-delete-connection.md
- `conv_delete_attachment` — Destructive — https://policylayer.com/tools/com-getmunin-munin/conv-delete-attachment.md
- `conv_rotate_widget_key` — Destructive — https://policylayer.com/tools/com-getmunin-munin/conv-rotate-widget-key.md
- `crm_delete_segment` — Destructive — https://policylayer.com/tools/com-getmunin-munin/crm-delete-segment.md
- `kb_delete_document` — Destructive — https://policylayer.com/tools/com-getmunin-munin/kb-delete-document.md
- `kb_dismiss_curation_candidate` — Destructive — https://policylayer.com/tools/com-getmunin-munin/kb-dismiss-curation-candidate.md
- `outreach_cancel_scheduled_send` — Destructive — https://policylayer.com/tools/com-getmunin-munin/outreach-cancel-scheduled-send.md
- `slack_unlink_user` — Destructive — https://policylayer.com/tools/com-getmunin-munin/slack-unlink-user.md
- `webhooks_delete` — Destructive — https://policylayer.com/tools/com-getmunin-munin/webhooks-delete.md
- `conv_request_callback` — Execute — https://policylayer.com/tools/com-getmunin-munin/conv-request-callback.md
- `conv_retry_delivery` — Execute — https://policylayer.com/tools/com-getmunin-munin/conv-retry-delivery.md
- `conv_send_email_channel_test` — Execute — https://policylayer.com/tools/com-getmunin-munin/conv-send-email-channel-test.md
- `conv_send_sms_channel_test` — Execute — https://policylayer.com/tools/com-getmunin-munin/conv-send-sms-channel-test.md
- `conv_test_email_channel` — Execute — https://policylayer.com/tools/com-getmunin-munin/conv-test-email-channel.md
- `conv_test_voice_sms_channel` — Execute — https://policylayer.com/tools/com-getmunin-munin/conv-test-voice-sms-channel.md
- `outreach_approve_proposal` — Execute — https://policylayer.com/tools/com-getmunin-munin/outreach-approve-proposal.md
- `seo_submit_urls` — Execute — https://policylayer.com/tools/com-getmunin-munin/seo-submit-urls.md
- `cancel_subscription` — Financial — https://policylayer.com/tools/com-getmunin-munin/cancel-subscription.md
- `outreach_withdraw_proposal` — Financial — https://policylayer.com/tools/com-getmunin-munin/outreach-withdraw-proposal.md
- `analytics_export_config` — Read — https://policylayer.com/tools/com-getmunin-munin/analytics-export-config.md
- `analytics_export_events` — Read — https://policylayer.com/tools/com-getmunin-munin/analytics-export-events.md
- `analytics_get_contact_journey` — Read — https://policylayer.com/tools/com-getmunin-munin/analytics-get-contact-journey.md
- `analytics_get_funnel` — Read — https://policylayer.com/tools/com-getmunin-munin/analytics-get-funnel.md
- …and 211 more: https://policylayer.com/tools/com-getmunin-munin.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=com-getmunin-munin · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-getmunin-munin