spring-projects / spring-projects/spring-ai
Only process annotated function parameters
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- Dominant language
- Java
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Description
Currently a mcp tool call will attempt to deserialize all function parameters, regardless of if they are annotated with @ToolParam or @McpToolParam. This makes it impossible to use other Spring annotations such as @AuthenticationPrincipal.
Just like @RestController and @GetMapping, etc. it should only process function parameters that are annotated appropriately.
Environment:
spring-ai-starter-mcp-server-webmvc:1.1.0-M2
running a stateless mcp server.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by tracing parameter deserialization in the spring-ai-starter-mcp-server-webmvc 1.1.0-M2 MCP server path, focusing on parameters annotated with @ToolParam or @McpToolParam and the interaction with @AuthenticationPrincipal. Done means unannotated parameters are left for other Spring argument handling while appropriately annotated parameters are still deserialized.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, spring
- Domain
- api, backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100