Add Workflow Edge

{
  "type": "object",
  "properties": {
    "workflow_id": {
      "type": "string",
      "description": "The workflow ID, e.g. workflow_abc123"
    },
    "from_node_id": {
      "type": "string",
      "description": "Source node ID, e.g. node_abc123"
    },
    "to_node_id": {
      "type": "string",
      "description": "Target node ID, e.g. node_xyz789"
    },
    "label": {
      "type": "string",
      "description": "Required and must exactly match a valid output key (\"COMPLETED\"/\"DNP\"/\"FAILED\" for VOICE_CALL, \"true\"/\"false\" for CONDITIONAL, \"success\"/\"failure\" for CUSTOM_FUNCTION) when connecting from those node types — this literally drives call-time routing, it is not cosmetic. Optional for TIME/APPLICATION sources."
    }
  },
  "required": [
    "workflow_id",
    "from_node_id",
    "to_node_id"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "id": {
      "description": "The created (or already-existing) edge ID, prefixed edge_..."
    },
    "workflow_id": {
      "description": "The workflow ID this edge belongs to, prefixed workflow_..."
    },
    "from_node_id": {
      "description": "Source node ID, prefixed node_..."
    },
    "to_node_id": {
      "description": "Target node ID, prefixed node_..."
    }
  },
  "additionalProperties": true,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "add_workflow_edge",
    "arguments": {
      "workflow_id": "workflow_abc123",
      "from_node_id": "VALUE",
      "to_node_id": "VALUE"
    }
  }
}