diff --git a/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml b/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml
index b7e1082..cf59f94 100644
--- a/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml
+++ b/src/FirmwarePlugin/PX4/PX4ParameterFactMetaData.xml
@@ -1664,7 +1664,7 @@ Increasing it makes the multi-rotor wind estimates adjust more slowly</short_des
       <decimal>1</decimal>
     </parameter>
     <parameter default="0.05" name="EKF2_EVA_NOISE" type="FLOAT">
-      <short_desc>Measurement noise for vision angle observations used when the vision system does not supply error estimates</short_desc>
+      <short_desc>Measurement noise for vision angle observations used to lower bound or replace the uncertainty included in the message</short_desc>
       <min>0.01</min>
       <unit>rad</unit>
       <decimal>2</decimal>
@@ -1677,7 +1677,7 @@ Sets the number of standard deviations used by the innovation consistency test</
       <decimal>1</decimal>
     </parameter>
     <parameter default="0.1" name="EKF2_EVP_NOISE" type="FLOAT">
-      <short_desc>Measurement noise for vision position observations used when the vision system does not supply error estimates</short_desc>
+      <short_desc>Measurement noise for vision position observations used to lower bound or replace the uncertainty included in the message</short_desc>
       <min>0.01</min>
       <unit>m</unit>
       <decimal>2</decimal>
@@ -1690,7 +1690,7 @@ Sets the number of standard deviations used by the innovation consistency test</
       <decimal>1</decimal>
     </parameter>
     <parameter default="0.1" name="EKF2_EVV_NOISE" type="FLOAT">
-      <short_desc>Measurement noise for vision velocity observations used when the vision system does not supply error estimates</short_desc>
+      <short_desc>Measurement noise for vision velocity observations used to lower bound or replace the uncertainty included in the message</short_desc>
       <min>0.01</min>
       <unit>m/s</unit>
       <decimal>2</decimal>