diff --git a/yaml/xyz/openbmc_project/Sensor/ValueMutability.interface.yaml b/yaml/xyz/openbmc_project/Sensor/ValueMutability.interface.yaml
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+++ b/yaml/xyz/openbmc_project/Sensor/ValueMutability.interface.yaml
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+description: >
+    Implement to provide sensor value mutability.
+properties:
+    - name: Mutable
+      type: boolean
+      default: false
+      description: >
+          A hint to a server that provides sensor access
+          to external users, such as an IPMI server,
+          as to whether or not to allow external users
+          to modify the value, via "set sensor value"
+          commands or similar. True to allow
+          modification (read-write). False to disallow
+          modification (read-only).