According to
https://modelcontextprotocol.io/specification/2025-06-18/basic/index#meta,
the _meta parameter should be passable when calling tools. While the
CallToolRequest class (in types.kt) currently includes _meta in its
definition, SDK users cannot actually input _meta when invoking the
callTool method.
This Pull Request adds a metadata parameter to the CallTool method and
includes functionality to convert various data formats without loss.
Additionally, to encourage the use of valid Key name formats as defined
by the protocol, validation for prefixes has been implemented.
---------
Co-authored-by: MAERYO <maeryo@hanwha.com>
Co-authored-by: devcrocod <devcrocod@gmail.com>
<!-- Provide a brief summary of your changes -->
## Motivation and Context
The
[schema](cca15204f6/schema/2025-03-26/schema.ts (L192))
for the InitializeResult contains an optional 'instructions' string
## Additional context
The instructions string is included in the schema for for version
"2025-03-26"
The instructions in the Server class are given as a provider function
with the result of the provider propagated to the underlying
ServerSession. As the ServerSession change is meant to allow for a
'Singleton scoped' server class, this provides the ability to
dynamically modify the instructions at the server level but have them be
immutable per session.
This also refactors the `serverInfo` and `instructions` properties to be
protected. This `Server` class is open and meant to be overridden, there
is no harm in having these immutable properties available to subclasses.
This adds the serverInstructions to the client as returned from the
InitializeResult. This is used to verify the response in the Server
tests.
fix#272
## How Has This Been Tested?
Locally
## Breaking Changes
No
## 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](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed
* Modularize SDK: migrated client and server implementations to separate modules. Removed old configuration files and reorganized the source code structure
* add support native targets and update js/wasm configurations
* Refactor sample projects: add samples as composite builds, replace hardcoded dependencies with version catalog, remove obsolete gradle wrapper files
* Update .gitignore: exclude SWE agent directories (.claude/ and .junie/)
* Refine CodeQL workflow: update Kotlin build steps to target individual modules separately instead of building all at once
