AWS‑IReveal‑MCP

Instructions

Lists log streams in a specified CloudWatch log group.

Parameters:
  aws_region (str): The AWS region - use 'us-east-1' if not specified.
  log_group (str): The name of the log group.
  limit (int): Maximum number of log streams to return.

Returns:
  str: JSON-formatted list of log streams.

Implementation Reference

• server.py:424-424 (registration)

  The @mcp.tool() decorator registers the cloudwatch_list_log_streams function as an MCP tool.

  @mcp.tool()

• server.py:425-447 (handler)

  The async handler function that executes the tool logic: lists log streams in the specified CloudWatch log group using boto3.logs client and returns JSON.

  async def cloudwatch_list_log_streams(
      aws_region: str, 
      log_group: str, 
      limit: int = 50
  ) -> str:
      """
      Lists log streams in a specified CloudWatch log group.
  
      Parameters:
        aws_region (str): The AWS region - use 'us-east-1' if not specified.
        log_group (str): The name of the log group.
        limit (int): Maximum number of log streams to return.
  
      Returns:
        str: JSON-formatted list of log streams.
      """
      try:
          cw_client = boto3.client('logs', region_name=aws_region)
          response = cw_client.describe_log_streams(logGroupName=log_group, limit=limit)
          log_streams = response.get('logStreams', [])
          return json.dumps(log_streams, indent=2)
      except Exception as e:
          return f"Error listing log streams: {str(e)}"