diff --git a/crates/api-grub/src/monitoring.rs b/crates/api-grub/src/monitoring.rs
index 461b32c..aeacf2d 100644
--- a/crates/api-grub/src/monitoring.rs
+++ b/crates/api-grub/src/monitoring.rs
@@ -76,7 +76,7 @@ pub async fn get_metrics_from_monitoring(duration: usize, delay: usize) -> anyho
 /// assert_eq!(a.get_measure_info(vec.clone()).await, Ok(()));
 /// ```
 /// 
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct MonitoringImporter {
     ip : String,
     login : String,
@@ -86,6 +86,17 @@ pub struct MonitoringImporter {
 }
 
 impl MonitoringImporter {
+    /// The most simple constructor for `MonitoringImporter`
+    /// 
+    /// Returns `Self` object that is constructing according to
+    /// env vars:
+    /// - `ENODE_MONITORING_IP`
+    /// - `ENODE_MONITORING_LOGIN`
+    /// - `ENODE_MONITORING_PASSWORD`
+    /// 
+    /// If env vars will not be set, it returns `Self` with 
+    /// empty fields
+    /// 
     pub async fn new() -> Self {
         MonitoringImporter {
             ip : env::var("ENODE_MONITORING_IP").unwrap_or_else(|_| String::new()),
@@ -95,12 +106,29 @@ impl MonitoringImporter {
             ts : String::new(),
         }
     }
+    /// Function that checks is current `MonitoringImporter` valid
+    /// and can be used to pull and push info to and from CM
+    /// 
     async fn is_valid(&self) -> bool {
         !self.ip.is_empty() && !self.login.is_empty() && !self.password.is_empty() 
     }
+    /// A setter of `timestamp` 
+    /// 
+    /// This function is needed to set a `timestamp` after 
+    /// CM session creation.
+    /// 
+    /// This `timestamp` is a date of creation a session
+    /// on the CM Server 
     async fn set_ts(&mut self, ts: &str) {
         self.ts = ts.to_owned();
     }
+    /// A function for creation CM session 
+    /// 
+    /// Returns OK(()) if session was created and there were 
+    /// no errors (neither internal no external)  
+    /// 
+    /// *Also* it saves ts and access-key in it's runtime environment,
+    /// there's no way to get access-key of session  
     pub async fn start_session(&mut self) -> anyhow::Result<()> {
         if !self.is_valid().await {
             return Err(Error::msg("Invalid eNODE-Monitoring configuration"));
@@ -277,4 +305,16 @@ impl MonitoringImporter {
             value : val.clone()
         })
     }
+}
+
+impl std::fmt::Debug for MonitoringImporter {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("MonitoringImporter")
+         .field("ip", &self.ip)
+         .field("login", &self.login)
+         .field("password", &"****")
+         .field("access_key", &"HIDDEN")
+         .field("ts", &self.ts)
+         .finish()
+    }
 }
\ No newline at end of file