standard tool annotation classes #270
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to address feature request: modelcontextprotocol#224
annotation classes. Added ToolResult, ToolAnnotation, and ToolAnnotations annotations. Added ToolGroupService interface and supporting tools.utils.*Description classes, to allow runtime querying of an service interface class' ToolDescriptions (one for each method with Tool annotation at runtime).
scottslewis
changed the title
@tool, @ToolParam, @ToolResult, @ToolAnnotations along with description (record) classes...e.g. ToolDescription for communicating the meta-data across processes in a consistent way.
This was referenced Jun 18, 2025
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Hi @scottslewis, Have you tried the https://github.com/spring-ai-community/mcp-annotations project? It provides annotation-based method handling for MCP servers in Java, built on the MCP Java SDK. Current annotations:
Here is a related example The core Goal: Graduate If you're interested in contributing, I'd recommend focusing on the mcp-annotation project. Until then, it's managed and released to Maven Central under its current project. |
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See issue #224
New annotation classes for @tool, @ToolParam, @ToolAnnotations, @ToolResult annotations.
Motivation and Context
Currently, each framework vendor (e.g. Spring, others) is defining it's own Java annotation classes, which binds (by package namespace) these annotations to a specific framework. Including these as part of the java mcp sdk will allow developers to use any framework rather than bind these classes to a specific framework.
How Has This Been Tested?
Have tested here: https://github.com/ECF/Py4j-RemoteServicesProvider/blob/master/examples/org.eclipse.ecf.examples.ai.mcp.toolservice/src/org/eclipse/ecf/examples/ai/mcp/toolservice/ArithmeticTools.java
If accepted, I will contribute automated tests. The existing annotation and *Description classes have been tested.
Breaking Changes
Only breaking changes will be for developers that are using the framework-specific annotations currently.
Yes as per above.
Types of changes
Checklist