chore(main): release toolbox-core 0.5.9

Author: release-please[bot]

.release-please-manifest.json

@@ -1,6 +1,6 @@
 {
   "packages/toolbox-langchain": "0.5.8",
-  "packages/toolbox-core": "0.5.8",
+  "packages/toolbox-core": "0.5.9",
   "packages/toolbox-llamaindex": "0.5.8",
   "packages/toolbox-adk": "0.5.8"
 }

packages/toolbox-core/CHANGELOG.md

@@ -1,5 +1,20 @@
 # Changelog
 
+## [0.5.9](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-core-v0.5.8...toolbox-core-v0.5.9) (2026-02-16)
+
+
+### Features
+
+* Deprecate Protocol.TOOLBOX (Native HTTP Protocol) ([#547](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/547)) ([b99ec50](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/b99ec503bb5d85e6bdf84f72343d90ac00ab8d88))
+* Enable package-specific client identification for MCP ([#525](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/525)) ([7ac0d3f](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/7ac0d3f167af1e47c26a3f43bdb48f3fc0a92109))
+
+
+### Miscellaneous Chores
+
+* **core:** Introduce warning when headers are sent over insecure HTTP connections ([#544](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/544)) ([832d4e7](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/832d4e7d035ee72fd1932bae830468f20cb80ed7))
+* **deps:** update mcp toolbox server version in integration tests to v0.27.0 to v0.27.0 ([#545](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/545)) ([851c7b5](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/851c7b542a18cd634b943d47b5b5331ac19dcd5b))
+* optimize CI dependency resolution to prevent PyPI version conflicts ([#546](https://github.com/googleapis/mcp-toolbox-sdk-python/issues/546)) ([7c4a608](https://github.com/googleapis/mcp-toolbox-sdk-python/commit/7c4a608734042e0d501bbe351ad0c0e295cfe909))
+
 ## [0.5.8](https://github.com/googleapis/mcp-toolbox-sdk-python/compare/toolbox-core-v0.5.7...toolbox-core-v0.5.8) (2026-01-28)
 
 

packages/toolbox-core/src/toolbox_core/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.5.8"
+__version__ = "0.5.9"