signal_compose_guidance

macOS

Purpose

Composes a Signal message and returns step-by-step guidance for the user to send it themselves. This tool does NOT send: Signal Desktop exposes no local send API and LMCP reads its database read-only, so it cannot transmit Signal messages. Call it when the user wants to message someone on Signal — it drafts the text and tells them how to deliver it. First call (show_send_steps=false or omitted) returns a preview; show_send_steps=true returns the send-it-yourself steps. chat_id should come from a previous signal_list_chats call — never fabricate IDs.

Required inputs

• chat_id — Chat ID from signal_list_chats
• text — Plain-text message body

Permissions and confirmation

No explicit confirmation parameter is exposed in this snapshot. This does not grant permission to act: obtain user authorization before any real action.

• Use only the apps, accounts and resources authorized by the user on this platform. Consult this tool's platform-specific description for its connection and permission requirements; this catalog does not assert additional OAuth scopes or OS entitlements.

{
  "properties": {
    "chat_id": {
      "description": "Chat ID from signal_list_chats",
      "type": "string"
    },
    "show_send_steps": {
      "description": "Set true to get the send-it-yourself steps. Default: preview only.",
      "type": "boolean"
    },
    "text": {
      "description": "Plain-text message body",
      "type": "string"
    }
  },
  "required": [
    "chat_id",
    "text"
  ],
  "type": "object"
}

Documentation example

Do not execute this example. These concrete inputs refer to a fictional demonstration dataset. Resolve real handles and obtain user authorization before any real call.

{
  "chat_id": "demo-chat-001",
  "text": "Can we review the launch checklist on Tuesday?"
}