diff --git a/tool_conf.xml.sample b/tool_conf.xml.sample
index 7cd9ece8f4b..7050298a72e 100644
--- a/tool_conf.xml.sample
+++ b/tool_conf.xml.sample
@@ -338,6 +338,7 @@
    <tool file="visualization/genetrack.xml" />
   </section>
   <section name="SAM Tools" id="samtools">
+   <tool file="samtools/sam_bitwise_flag_filter.xml" />
    <tool file="samtools/sam_to_bam.xml" />
    <tool file="samtools/sam_merge.xml" />
    <tool file="samtools/sam_pileup.xml" />
diff --git a/tools/metag_tools/split_paired_reads.xml b/tools/metag_tools/split_paired_reads.xml
index f5c944c2bff..50ee2187a06 100644
--- a/tools/metag_tools/split_paired_reads.xml
+++ b/tools/metag_tools/split_paired_reads.xml
@@ -20,7 +20,7 @@
         
 **What it does**
  
-This tool splits a single paired-end file in half and returns two files with each ends.  
+Splits a single fastq datasret representing paired-end run into two datasets (one for each end). This tool works only for datasets where both ends have **the same** length.  
 
 -----