diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index 26d9d9c..3d974c7 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -1627,8 +1627,9 @@
  * \retval #PSA_ERROR_DATA_CORRUPT
  * \retval #PSA_ERROR_DATA_INVALID
  * \retval #PSA_ERROR_BAD_STATE
- *         The operation state is not valid (it must be active, but beyond that
- *         validity is specific to the algorithm), or
+ *         The operation state is not valid (it must be active, and fully set
+ *         up, and this call must conform to the algorithm's requirements
+ *         for ordering of input and output steps), or
  *         the library has not been previously initialized by psa_crypto_init().
  *         It is implementation-dependent whether a failure to initialize
  *         results in this error code.
@@ -1681,8 +1682,9 @@
  * \retval #PSA_ERROR_DATA_CORRUPT
  * \retval #PSA_ERROR_DATA_INVALID
  * \retval #PSA_ERROR_BAD_STATE
- *         The operation state is not valid (it must be active, but beyond that
- *         validity is specific to the algorithm), or
+ *         The operation state is not valid (it must be active, and fully set
+ *         up, and this call must conform to the algorithm's requirements
+ *         for ordering of input and output steps), or
  *         the library has not been previously initialized by psa_crypto_init().
  *         It is implementation-dependent whether a failure to initialize
  *         results in this error code.