ms-sentinel-mcp-server

Instructions

Implementation Reference

• tools/analytics_tools.py:360-421 (handler)

  The MCPToolBase subclass that implements the core logic of the tool. The `run` method fetches all Sentinel analytics rules, extracts MITRE tactics from each rule's tags, groups and counts rules by tactic (lowercased), and returns a structured dictionary with counts and rule lists per tactic.

  class SentinelAnalyticsRulesCountByTacticTool(MCPToolBase):
      """
      Count Sentinel analytics rules by tactic.
      Extracts tactics from each rule and returns a mapping of tactic to count and
      rule summaries.
      """
  
      name = "sentinel_analytics_rules_count_by_tactic"
      description = "Count Sentinel analytics rules by tactic."
  
      async def run(self, ctx: Context, **kwargs) -> Dict:
          """
          Count analytics rules by tactic.
          Returns a dict: {tactic: {count: int, rules: [{id, display_name}]}}
          """
          logger = self.logger
          workspace, resource_group, subscription_id = self.get_azure_context(ctx)
          if not (workspace and resource_group and subscription_id):
              logger.error("Missing Azure Sentinel context for analytics rule listing.")
              return {"error": "Missing Azure Sentinel context."}
          client = self.get_securityinsight_client(subscription_id)
          tactic_map = {}
          try:
              rules = client.alert_rules.list(
                  resource_group_name=resource_group,
                  workspace_name=workspace,
              )
              for rule in rules:
                  rule_dict = rule.as_dict() if hasattr(rule, "as_dict") else dict(rule)
                  # pylint: disable=unused-variable
                  tags, tactics, _ = extract_tags_tactics_techniques_from_dict(rule_dict)
                  display_name = (
                      rule_dict.get("display_name")
                      or rule_dict.get("displayName")
                      or rule_dict.get("name")
                  )
                  for tactic in tactics or ["Unknown"]:
                      tkey = tactic.lower() or "unknown"
                      if tkey not in tactic_map:
                          tactic_map[tkey] = {"count": 0, "rules": []}
                      tactic_map[tkey]["count"] += 1
                      tactic_map[tkey]["rules"].append(
                          {
                              "id": rule_dict.get("id"),
                              "display_name": display_name,
                          }
                      )
              return {
                  "valid": True,
                  "error": None,
                  "results": tactic_map,
                  "errors": [],
              }
          except Exception as e:
              logger.error("Error in %s: %s", self.__class__.__name__, str(e))
              return {
                  "valid": False,
                  "error": str(e),
                  "results": None,
                  "errors": [str(e)],
              }

• tools/analytics_tools.py:619-619 (registration)

  The call to register this tool class with the MCP server instance.

  SentinelAnalyticsRulesCountByTacticTool.register(mcp)

• tools/analytics_tools.py:297-358 (helper)

  Helper utility function to parse tags, tactics, and techniques from Sentinel analytics rule or template dictionaries. Called within the handler to extract tactics for grouping.

  def extract_tags_tactics_techniques_from_dict(obj):
      """
        Extract tags, tactics, and techniques from an analytics rule/template dict.
  
      Args:
          obj (dict): Analytics rule or template dictionary.
  
      Returns:
          tuple: (tags, tactics, techniques)
              tags (list[dict]): All tags as {name, value} pairs.
              tactics (list[str]): List of tactics (from tags or legacy fields).
              techniques (list[str]): List of techniques (from tags or legacy fields).
  
      Extraction precedence:
          - Tactics/techniques: Prefer tags with name 'tactics'/'techniques'
            (case-insensitive, split on comma). Fallback to legacy fields.
          - Tags: All tags as {name, value} pairs (robust to SDK object, dict, or string).
      """
      tags = []
      tactics = []
      techniques = []
      raw_tags = obj.get("tags")
      if raw_tags:
          for tag in raw_tags:
              tag_name = None
              tag_value = None
              if isinstance(tag, dict):
                  tag_name = tag.get("name") or tag.get("Name")
                  tag_value = tag.get("value") or tag.get("Value")
              elif hasattr(tag, "name") and hasattr(tag, "value"):
                  tag_name = getattr(tag, "name", None)
                  tag_value = getattr(tag, "value", None)
              elif isinstance(tag, str):
                  tag_name = tag
                  tag_value = None
              else:
                  try:
                      tag_name = str(tag)
                  except Exception:
                      continue
              if tag_name is not None:
                  tags.append({"name": tag_name, "value": tag_value})
      for tag in tags:
          if tag["name"] and isinstance(tag["name"], str):
              if tag["name"].lower() == "tactics" and tag["value"]:
                  tactics += [t.strip() for t in tag["value"].split(",") if t.strip()]
              elif tag["name"].lower() == "techniques" and tag["value"]:
                  techniques += [t.strip() for t in tag["value"].split(",") if t.strip()]
      legacy_tactics = obj.get("tactics")
      if legacy_tactics:
          tactics += [
              t.strip() for t in legacy_tactics if isinstance(t, str) and t.strip()
          ]
      legacy_techniques = obj.get("techniques")
      if legacy_techniques:
          techniques += [
              t.strip() for t in legacy_techniques if isinstance(t, str) and t.strip()
          ]
      tactics = list(dict.fromkeys([t for t in tactics if t]))
      techniques = list(dict.fromkeys([t for t in techniques if t]))
      return tags, tactics, techniques