docs: update TODO with completion status and summary

- Mark all phases as complete
- Add summary of changes
- Document breaking changes for users

Author: JMLX42

TODO.md

@@ -35,14 +35,30 @@ Implement changes based on PR review feedback from https://github.com/modelconte
 - [x] Update documentation in `crates/rmcp/src/handler/server/tool.rs` (done in Phase 1)
 
 ### Phase 6: Update validation logic
-- [ ] Modify validation in `crates/rmcp/src/handler/server/router/tool.rs` to use trait-based schema
-- [ ] Ensure validation happens at the right point in the pipeline
+- [x] Modify validation in `crates/rmcp/src/handler/server/router/tool.rs` to use trait-based schema (already validates correctly)
+- [x] Ensure validation happens at the right point in the pipeline (validates after tool execution)
 
 ### Phase 7: Final cleanup
-- [ ] Run all tests and fix any failures
-- [ ] Update any remaining documentation
-- [ ] Ensure all examples compile and run correctly
-- [ ] Create migration notes for the breaking change
+- [x] Run all tests and fix any failures
+- [x] Update any remaining documentation
+- [x] Ensure all examples compile and run correctly
+- [x] Create migration notes for the breaking change (in commit messages)
+
+## Summary
+
+All phases have been completed successfully:
+1. Replaced Structured<T> with Json<T> for structured output
+2. Added output_schema() method to IntoCallToolResult trait
+3. Updated macro to detect Json<T> wrapper specifically
+4. Added builder methods to Tool struct for setting schemas
+5. Updated all examples and tests
+6. Validation logic already works correctly
+7. All tests pass and code is clean
+
+## Breaking Changes
+
+- `Structured<T>` has been replaced with `Json<T>`. Users must update their code to use `Json<T>` for structured tool outputs.
+- The macro now only generates output schemas for `Json<T>` wrapped types, not for generic `Result<T, E>` types.
 
 ## Commands to run after each phase:
 ```bash