The VerbsToken smart contract contains two critical functions, setContractURIHash and setDescriptor, that pose potential risks due to their ability to alter contract-level and individual NFT metadata, respectively. 
The setContractURIHash function, with a low to medium severity level, allows changing the collection-level metadata, which could impact the overall perception and value of the NFTs in the market. This might lead to confusion or mistrust among NFT owners and potential buyers if the collections description or theme is altered significantly. 
On the other hand, the setDescriptor function poses a high-severity risk, as it directly affects the tokenURI of each NFT. Changes made by this function can be substantial as the tokenURI typically points to a JSON file that contains the NFTs appearance and features, potentially compromising their originality and authenticity. This could have severe implications for the NFTs value and the owners rights.
The presence of a lockDescriptor function, which irreversibly prevents further changes to the descriptor, shows an awareness of the potential risks associated with changing NFT metadata. However, the absence of a similar lock function for the contractURIHash indicates a different level of consideration for the collection-level metadata compared to the individual NFT metadata.
To mitigate these risks, it is recommended to implement immutable metadata practices, enhance transparency and community involvement in any changes, provide clear documentation, and introduce a versioning system for metadata. 
