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Release v0.29.0

What's Changed

• refactor: make CallToolRequest.Arguments more flexible (Breaking Change) by@​ezynda3 inmark3labs/mcp-go#287
• Drop unused fields from server.sseSession by@​ggoodman inmark3labs/mcp-go#303
• chore: remove unused variables and type arguments by@​pottekkat inmark3labs/mcp-go#302
• chore(Srv/stdio): duplicated setting of ErrorLogger by@​cryo-zd inmark3labs/mcp-go#306
• fix: handle the situation where the channel is closed by@​button-chen inmark3labs/mcp-go#304

Breaking Changes

Inv0.29.0, MCP-Go introduces breaking changes to tool request handling. The main change is thatrequest.Params.Arguments is no longer directly accessible as a map. Instead, you must use the newGetArguments() method to retrieve arguments as a map. For type-safe argument access, new helper methods likeRequireString(),RequireFloat(), andRequireBool() have been added. To migrate:

1. Replace direct access torequest.Params.Arguments["key"] withrequest.GetArguments()["key"]
2. For better type safety, use the new helper methods:request.RequireString("key"),request.RequireFloat("key"), etc.
3. For complex argument structures, use the newBindArguments() method with a struct, or try the new typed tool handlers withmcp.NewTypedToolHandler() as shown in the newexamples/typed_tools example.

New Contributors

• @​ggoodman made their first contribution inmark3labs/mcp-go#303
• @​button-chen made their first contribution inmark3labs/mcp-go#304

Full Changelog:mark3labs/mcp-go@v0.28.0...v0.29.0

• 99720bb fix: handle the situation where the channel is closed (#304)
• 420d521 chore(Srv/stdio): duplicated setting of ErrorLogger (#306)
• eaa6f29 chore: remove unused variables and type arguments (#302)
• 65010c4 chore: drop unused fields from sseSession (#303)
• 28c9cc3 refactor: make CallToolRequest.Arguments more flexible (Breaking Change) (#287)
• See full diff incompare view

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