Research across 8 multi-server agent clients (Claude Code, Codex, Gemini
CLI, VS Code, Cline, Roo Code, Goose, OpenCode) showed all of them keep
the server namespace in model-facing MCP tool names; the RFC's premise
for raw names ("servers already prefix their tools") is false for the
official GitHub/filesystem/Sentry servers.
- Config: drop toolPrefix; require serverName ([A-Za-z0-9_-]{1,32}),
duplicate serverName fails the later instance at load (per-root
reservation, released on dispose)
- Names: always mcp__<serverName>__<rawName>; normalize to the DeepSeek
64-char [A-Za-z0-9_-] contract with a deterministic 12-hex identity
hash on lossy normalization; raw name is the only thing sent on the
wire (tools/call)
- Sync: two-phase fetch/swap — fetch failure keeps the previous
generation; a swap conflict rolls back the whole generation (never a
partial set); duplicate raw names reject the tool list
- RFC: moved to implemented/ (status + skeleton rewritten per the
format contract), naming design + tier-level test coverage recorded
- Tests: naming algorithm unit suite; keyless Streamable HTTP e2e
against an in-process StreamableHTTPServerTransport (namespace
discovery, execution, per-request auth headers); dotted-name
normalization e2e via a new fixture tool
lintianle
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