MCP server crashes on elicitation capabilities from 2025-11-25 clients (Java SDK ≤ 0.17.1) #26454

Affected module
Backend — MCP server (openmetadata-mcp)

Describe the bug
MCP clients implementing the 2025-11-25 specification (Claude Code 2.1.74+, VS Code Copilot, etc.) send elicitation capabilities in the initialize request. The OpenMetadata MCP server fails to deserialize this because ClientCapabilities.Elicitation in Java MCP SDK ≤ 0.17.1 is an empty record with no known properties. Jackson throws UnrecognizedPropertyException on the form field, crashing the handshake before protocol version negotiation can complete.

As a result, no MCP client implementing the 2025-11-25 spec can connect at all.

This is the same underlying bug as modelcontextprotocol/java-sdk#724, fixed in java-sdk PR #731 (SDK 0.18.0+).

To Reproduce

1. Deploy OpenMetadata 1.12.1 (or 1.11.x) with MCP enabled
2. Connect with any MCP client using protocol 2025-11-25 (e.g. Claude Code ≥ 2.1.74)
3. Client sends initialize request:

{
  "method": "initialize",
  "params": {
    "protocolVersion": "2025-11-25",
    "capabilities": {
      "roots": {},
      "elicitation": {
        "form": {},
        "url": {}
      }
    }
  }
}

4. Server responds with error:

{"jsonrpc":"2.0","id":0,"error":{"code":-32603,"message":"Unrecognized field \"form\" (class io.modelcontextprotocol.spec.McpSchema$ClientCapabilities$Elicitation), not marked as ignorable (0 known properties: ])\n at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: ...McpSchema$ClientCapabilities$Elicitation[\"form\"])"}}

5. Connection fails — no tools are available to the client

Expected behavior
The MCP server should accept initialize requests from clients advertising 2025-11-25 capabilities (including elicitation), negotiate down to its supported protocol version, and respond normally.

Version:

• OS: macOS 15.5 (client), Linux (server)
• Python version: N/A (Java backend)
• OpenMetadata version: 1.11.4 (also verified against 1.12.1 pom.xml)
• MCP Java SDK: 0.14.0 (1.11.x) / 0.17.1 (1.12.1) — both affected
• Client: Claude Code 2.1.74

Additional context

Suggested fix: Upgrade the Java MCP SDK dependency from 0.17.1 to ≥ 0.18.0 in pom.xml:

<mcp-sdk.version>0.18.0</mcp-sdk.version>

This is the same type of fix as #23982 / PR #24850 (SDK 0.11.2 → 0.14.0 for 2025-06-18 support).

Workaround: We wrote a STDIO→HTTP proxy that strips elicitation capabilities from the initialize request and translates protocolVersion between 2025-11-25 (client) and 2025-06-18 (server). Happy to share if others need it before the fix ships.