ms-sentinel-mcp-server

Instructions

Implementation Reference

• tools/hunting_tools.py:146-185 (handler)

  The async run method that executes the tool: fetches Sentinel saved searches, extracts tactics from each using the helper function, counts queries per tactic (lowercased), and returns a map of tactic to count and list of query IDs/names.
  async def run(self, ctx: Context, **_): """ Count Sentinel hunting queries (saved searches) by tactic. Extracts tags, tactics, and techniques using shared utility. """ workspace_name, resource_group, subscription_id = self.get_azure_context(ctx) client = self.get_loganalytics_client(subscription_id) tactic_map = {} try: searches = client.saved_searches.list_by_workspace( resource_group, workspace_name ) for s in getattr(searches, "value", []): _, s_tactics, _ = extract_tags_tactics_techniques(s) for tactic in s_tactics or ["Unknown"]: tkey = tactic.lower() or "unknown" if tkey not in tactic_map: tactic_map[tkey] = {"count": 0, "queries": []} tactic_map[tkey]["count"] += 1 tactic_map[tkey]["queries"].append( { "id": s.id, "display_name": getattr(s, "display_name", s.name), } ) return { "valid": True, "error": None, "results": tactic_map, "errors": [], } except Exception as e: self.logger.error("Error in %s: %s", self.__class__.__name__, str(e)) return { "valid": False, "error": str(e), "results": None, "errors": [str(e)], }
• tools/hunting_tools.py:285-285 (registration)

  Registers the tool class with the MCP server instance.
  SentinelHuntingQueriesCountByTacticTool.register(mcp)
• tools/hunting_tools.py:12-74 (helper)

  Helper function to robustly extract tags, tactics, and techniques from Sentinel hunting query objects (handling various formats: SDK objects, dicts, lists, strings). Used at line 159 in the handler to get tactics for counting.
  def extract_tags_tactics_techniques(obj): """ Extracts tags, tactics, and techniques from a hunting query object. Returns: tags: List of {name, value} dicts. tactics: List of tactics (from tags or legacy fields). techniques: 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 = [] # Extract tags as list of {name, value} raw_tags = getattr(obj, "tags", None) if raw_tags: for tag in raw_tags: tag_name = None tag_value = None # Tag as dict if isinstance(tag, dict): tag_name = tag.get("name") or tag.get("Name") tag_value = tag.get("value") or tag.get("Value") # Tag as object with .name/.value elif hasattr(tag, "name") and hasattr(tag, "value"): tag_name = getattr(tag, "name", None) tag_value = getattr(tag, "value", None) # Tag as string: treat as name only elif isinstance(tag, str): tag_name = tag tag_value = None # Fallback: try string conversion else: try: tag_name = str(tag) except Exception: continue if tag_name is not None: tags.append({"name": tag_name, "value": tag_value}) # Tactics/techniques from tags (case-insensitive match) 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()] # Fallback: legacy fields legacy_tactics = getattr(obj, "tactics", None) if legacy_tactics: tactics += [ t.strip() for t in legacy_tactics if isinstance(t, str) and t.strip() ] legacy_techniques = getattr(obj, "techniques", None) if legacy_techniques: techniques += [ t.strip() for t in legacy_techniques if isinstance(t, str) and t.strip() ] # Deduplicate and preserve order 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
• tools/hunting_tools.py:142-145 (schema)

  Tool class definition including the canonical name and description used for MCP registration and schema inference.
  class SentinelHuntingQueriesCountByTacticTool(MCPToolBase): name = "sentinel_hunting_queries_count_by_tactic" description = "Count Sentinel hunting queries (saved searches) by tactic"