AI-generated Key Takeaways
- 
          
The page lists various Ad Manager API services, each linking to documentation on
StringLengthError.Reason. - 
          
The
StringLengthError.Reasonenumeration provides reasons for string length errors, includingTOO_LONG,TOO_SHORT, andUNKNOWN. - 
          
This page appears to detail the specific
StringLengthError.Reasonfor theProposalLineItemService, and likely for all other listed services as well. 
- Namespace
 - 
               
https://www.google.com/apis/ads/publisher/v202508 
| Enumeration | Description | 
|---|---|
                        TOO_LONG
                      | 
                     |
                        TOO_SHORT
                      | 
                     |
                        UNKNOWN
                      | 
                     The value returned if the actual value is not exposed by the requested API version. |