DO NOT MERGE: throwaway interface change to test #4975

[cliffhall]

Part of #4860. Throwaway test for #4975, do not merge; it will be closed and its branch deleted once the check has run.

It changes the echo tool's description and adds an optional shout parameter, so the Everything Server MCP Diff sticky comment should report a changed interface instead of "No interface changes detected".

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[changeset-bot]

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Latest commit: 43c36c4

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[github-actions]

everything: MCP interface diff

Base: 6eebb0c65045 (chore(interface-diff): refresh the lockfile after rebasing onto v2/main (#4860))
Head: the build in this checkout, at 3c11ebcfd8fd (Merge 43c36c4 into 6eebb0c)

⚠️ Interface changes detected in 1 part(s) of the interface. Review them below to confirm they are intended.

	Tools	Prompts	Resources	Resource templates
Base	12	4	7	2
Head	12	4	7	2

tools

--- base/tools.json
+++ target/tools.json

- tools[echo].description: "Echoes back the input string"
+ tools[echo].description: "Echoes back the input string, verbatim"
+ tools[echo].inputSchema.properties.shout: {"description":"Uppercase the reply","type":"boolean"}

_{Updated by this run for 43c36c4ccdc9673bbd8958eb8d0fd7e81d81f124.}

[cliffhall]

Test complete: the sticky comment reported the planted echo change as intended. The method and results are recorded in #4975's "How Has This Been Tested?" section (item 9). Closing unmerged.