For each issue anchor present in BASE 63279301bc non-test .py and absent on HEAD, the BASE comment/docstring block was re-attached at the HEAD location of the code it explained (matched by the distinctive code line / enclosing def). Sentences already covered by an existing HEAD comment were deduped; the issue number always survives. Insert-only: no code lines changed.
`_write_schema_cache` in the extracted owner tools/mcp_tool_registration.py
read `t.inputSchema` with a bare camelCase getattr. mcp 2.0 renamed the
model field to `input_schema` and kept `inputSchema` only as a serialization
alias, which pydantic does not apply to attribute access, so on SDK 2.x the
cache persisted `"inputSchema": {}` for every tool and a `lazy: true` server
registered from that cache was advertised to the model with all parameters
stripped. Pre-existing on BASE (tools/mcp_tool.py); fixed with the canonical
`mcp_field(t, "input_schema", "inputSchema")` helper, as both PRs do.
Adds the real-SDK regression test from #102129 (genuine `mcp.types.Tool`
driven through `_register_server_tools` -> cache write ->
`_register_from_cache_sync`), ported to the new module layout and isolated
from the module-global registration state.
Co-authored-by: mzkarami <mehrzad.karami@gmail.com>
Co-authored-by: lijinxiao1982 <120761624+lijinxiao1982@users.noreply.github.com>
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