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spring-ai/mcp-advanced/output/06-no-capabilities.txt
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asmhatreandClaude Sonnet 5.5 0006167c24 Add mcp-advanced module: resources, prompts, sampling and elicitation on Spring AI 2.0.2 and MCP Java SDK 2.1.0
An incident-desk MCP server with a fixed resource, two resource templates, a prompt, a tool that borrows the client's model (sampling) and a tool that asks the operator to approve a restart (elicitation). Driven by a plain SDK client in JUnit and by raw curl, so the JSON-RPC for both server-to-client requests is committed. Also captured: a client that declared neither capability (a gated tool degrades, an ungated one returns an isError result), a slow client hitting the server request timeout, and protocol=STATELESS silently dropping every tool that takes McpSyncRequestContext (one WARN line, an empty tools/list). Negotiated protocol version is 2025-11-25; the 2026-07-28 spec is not implemented by SDK 2.1.0. No docs/ folder.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b5jAFLJrmUXmbo5EuV
2026-11-10 18:47:09 +00:00

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# a client that declared neither sampling nor elicitation
summarize_incident (gated with sampleEnabled()):
SAMPLING_UNAVAILABLE -- client has no model to lend. Raw log:
11:02:44 search-api WARN index segment merge running
11:02:51 search-api INFO p99 latency 840ms (SLO 500ms)
restart_service (gated with elicitEnabled()):
ELICITATION_UNAVAILABLE -- refusing to restart payments-api without an approval channel
summarize_incident_ungated (calls sample() with no check):
result: Sampling not supported by the client: Implementation[name=Java SDK MCP Client, title=null, version=0.15.0, description=null, icons=null, websiteUrl=null]
Sampling not supported by the client: Implementation[name=Java SDK MCP Client, title=null, version=0.15.0, description=null, icons=null, websiteUrl=null]
isError: true