Add Primitive repository APIs (`ResourceRepository`, `ToolsRepository`, ... )

[sdelamo]

Currently, McpStatelessAsyncServer and McpAsyncServer save resources, tools, prompts, and completionswithCopyOnWriteArrayList`.

https://github.com/modelcontextprotocol/java-sdk/blob/main/mcp-core/src/main/java/io/modelcontextprotocol/server/McpStatelessAsyncServer.java#L60-L68

I want to provide an API (for example, ResourcesRepository) that, by default, uses the current in-memory strategy but can be replaced, for example, by a dynamic implementation that returns a different list of resources depending on the currently authenticated user.

[chemicL]

I believe the repository-oriented design should be able to address the needs expressed in #593 (comment). If we can unify these ideas in this issue we could close #593 and make progress designing a comprehensive solution with this issue. @tzolov, @sdelamo WDYT?

[hbsjz-swl]

@sdelamo @chemicL
hi, I think these problems are essentially the same type of problems that the org.springframework.ai.mcp.McpToolUtils.prefixedToolName(String prefix, String title, String toolName) method in the SpringAI project solves. They are all about how to manage tools by grouping them so that the MCP client can more intelligently heuristically call tools among a large number of tools, first calling the tool group and then calling the specific tool.
https://github.com/spring-projects/spring-ai/blob/main/mcp/common/src/main/java/org/springframework/ai/mcp/McpToolUtils.java

[ultramancode]

Hi! @sdelamo @chemicL Could you take a look at my pr (#747)? I think it’s closely related to this issue, and I’d really appreciate any feedback.