modelcontextprotocol
Adding description field to the FastMCP get_prompt method
Issue: https://github.com/modelcontextprotocol/python-sdk/issues/602
The GetPromptResult class has the field description, however it is not getting returned when using the FastMCP server.
Example
INFO Processing request of type GetPromptRequest server.py:534
meta=None description=None messages=[PromptMessage(role='user', content=TextContent(type='text', text='ABCABCABCB', annotations=None))]
Expected behavior
INFO Processing request of type GetPromptRequest server.py:534
meta=None description="This prompt summarizes the brave search data" messages=[PromptMessage(role='user', content=TextContent(type='text', text='ABCABCABCB', annotations=None))]
Motivation and Context
Currently, retrieving both the description and messages for a prompt requires two separate calls: one to list_prompts to get the prompt names, and then individual get_prompt calls for each prompt to fetch the full details. This adds unnecessary complexity and overhead, as we then have to manually map the results together to create a complete prompt object with both description and messages.
Proposed Change
Update theget_prompt to return the prompt details (including description and messages) directly, reducing complexity.
How Has This Been Tested?
- Tested locally
- Added a new test
test_get_prompt_with_description
Breaking Changes
No breaking changes
Types of changes
- [X] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)
- [ ] Documentation update
Checklist
- [x] I have read the MCP Documentation
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [ ] I have added or updated documentation as needed
