Bump mcp from 0.21.0 to 0.23.0

[dependabot]

Bumps mcp from 0.21.0 to 0.23.0.

Release notes

Sourced from mcp's releases.

v0.23.0

Added

• Add a session-ownership hook to StreamableHTTPTransport

Changed

• Require calling MCP::Client#connect before sending requests on stdio transport (#427)

Deprecated

• Annotate Roots, Sampling, and Logging APIs as deprecated per SEP-2577 (#429)

Fixed

• Fix an incorrect result: null response to an id-bearing notification message (#435)
• Validate Host and Origin headers to prevent DNS rebinding per MCP 2025-11-25
• Bound stateful session retention to prevent an initialize-flood DoS
• Bound stdio frame reads with max_line_bytes
• Bound request body and frame reads to prevent memory-exhaustion DoS

v0.22.0

Added

• Add audience role validation for MCP::Annotations per MCP specification (#422)
• Send SEP-2243 Mcp-Method and Mcp-Name headers per MCP specification (#423)
• Support client-side notifications/cancelled per MCP specification (#425)

Changed

• Conform Tool Schemas to JSON Schema 2020-12 per SEP-2106 (#417)

Fixed

• Fix a SyntaxError on Ruby 2.7.0 caused by arguments forwarding syntax (#419)

Changelog

Sourced from mcp's changelog.

[0.23.0] - 2026-07-07

Added

• Add a session-ownership hook to StreamableHTTPTransport

Changed

• Require calling MCP::Client#connect before sending requests on stdio transport (#427)

Deprecated

• Annotate Roots, Sampling, and Logging APIs as deprecated per SEP-2577 (#429)

Fixed

• Fix an incorrect result: null response to an id-bearing notification message (#435)
• Validate Host and Origin headers to prevent DNS rebinding per MCP 2025-11-25
• Bound stateful session retention to prevent an initialize-flood DoS
• Bound stdio frame reads with max_line_bytes
• Bound request body and frame reads to prevent memory-exhaustion DoS

[0.22.0] - 2026-06-27

Added

• Add audience role validation for MCP::Annotations per MCP specification (#422)
• Send SEP-2243 Mcp-Method and Mcp-Name headers per MCP specification (#423)
• Support client-side notifications/cancelled per MCP specification (#425)

Changed

• Conform Tool Schemas to JSON Schema 2020-12 per SEP-2106 (#417)

Fixed

• Fix a SyntaxError on Ruby 2.7.0 caused by arguments forwarding syntax (#419)

Commits

• 95feef2 Merge pull request #442 from koic/release_0_23_0
• 494f43d Release 0.23.0
• 6cb78ea Merge commit from fork
• 772e0cb Bound Request Body and Frame Reads to Prevent Memory-Exhaustion DoS
• 0ede5fc Merge commit from fork
• 3546660 Add a Session-Ownership Hook to StreamableHTTPTransport
• 4b400be Merge commit from fork
• dfdd4ef Merge upstream modelcontextprotocol/ruby-sdk main
• cfccb7c Merge commit from fork
• c893075 Merge commit from fork
• Additional commits viewable in compare view