[saworbit]

After #1469 the full tools/list profile was 3 bytes under its 210,400 budget, so the next change to add a byte would fail the Python suite. This wins back room by shortening text that repeats across tools, or that gives reasoning the refusal already gives. Nothing a caller needs to call a tool right is gone, and the budgets are unchanged.

Profile	Before	After	Budget
full	210,397	208,471	210,400
core	96,868	96,183	96,900

Where the bytes came from.

• confirmation_token, on 15 tools, is now "Single-use token from a dry run of this exact call." It still says single use and exact call.
• The legacy alias notes on 10 tools say what they said before in fewer words: which tool the name is, that the canonical one is listed too, and that error data reports the canonical name. The two with no canonical still say _meta.didi has none.
• select_main_screen, create_if_missing, symbol_type and board lose the clause that explained a default or a refusal. The refusal still explains itself. A misspelt symbol, for one, is a 404 whose retry_with names create_if_missing.
• overwrite, below.

Two descriptions were wrong.

• The shared overwrite text said a call with overwrite: true is confirmation-gated. scene_create and scene_pack_branch use that text, and neither can ask for a token, so a caller was told to dry-run for a token that never comes. It now says only what is true of every tool that uses it. resource_create, the one gated tool that used it, says so in its own entry, as script_create already did. A new test fails any tool that says it is confirmation-gated and publishes no confirmation_token. With the old text put back, it fails naming scene_create.
• scene_create's root_name said it defaults to a name derived from the file. Both routes and the schema name the root Root. The root_type entry beside it was never served, because the schema's own text wins, and it still listed the three classes scene_create can only make Node2D, Node3D and Control roots, so every scene a 2D game needs has to be built through scene_pack_branch and nothing says so #740 widened, so it is gone.

I checked every other "Defaults to" sentence against its schema default, and the rest agree.

The contract snapshots move for description text only. The reference never said scene_create was gated, so no doc changed. The full native suite, the Python suite, the docs validator and the test counts pass locally.