Reduce Repo Assist GitHub MCP tool scope

[Copilot]

Repo Assist exceeded its per-run AI credit budget because the workflow was loading the full GitHub MCP tool surface into context. This change narrows the workflow to the GitHub toolsets Repo Assist actually uses, reducing ambient context without changing its intended capabilities.

• Scope reduction

  • Replace toolsets: [all] in the Repo Assist workflow source with a targeted set:
    • default
    • search
    • discussions
    • actions

• Compiled workflow alignment

  • Update the generated lock file so the runtime MCP configuration matches the narrowed source configuration.
  • The compiled GitHub MCP toolset list now expands default explicitly instead of requesting all.

• Effect

  • Keeps issue, PR, repo, search, discussion, and Actions access available to Repo Assist.
  • Removes unrelated GitHub tool definitions from the workflow context to lower token/AI credit overhead.

tools:
  github:
    toolsets: [default, search, discussions, actions]
    allowed-repos: ["github/*"]
    min-integrity: unapproved

[Copilot]

Pull request overview

This PR narrows the GitHub MCP tool surface available to the Repo Assist workflow to reduce per-run AI credit usage, while preserving the set of GitHub capabilities Repo Assist relies on.

Changes:

• Updated Repo Assist workflow source to replace toolsets: [all] with toolsets: [default, search, discussions, actions].
• Updated the compiled lock workflow to align runtime MCP configuration by expanding toolsets explicitly (via GITHUB_TOOLSETS) instead of requesting all.

Show a summary per file

File	Description
.github/workflows/repo-assist.md	Restricts the GitHub MCP toolsets loaded into context for Repo Assist.
.github/workflows/repo-assist.lock.yml	Aligns compiled/runtime MCP env (GITHUB_TOOLSETS) with the narrower toolset selection.

Copilot's findings

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• Files reviewed: 2/2 changed files
• Comments generated: 0