fix(agent-core-v2): activate select tools for disclosure

[huige66631]

Problem

In v2 headless runs with progressive tool disclosure enabled, the main agent is told to use select_tools for MCP tools, but AgentToolActivationService only registers tools present in the profile allowlist. The built-in agent profile includes mcp__* but omits select_tools, leaving the gateway absent from the runtime schema.

Solution

Keep normal contribution activation unchanged and add a narrow exception for the disclosure gateway. When the contribution is select_tools, progressive disclosure is enabled, and the disclosure policy permits it, activation registers the tool even when the profile allowlist omits it. This reuses the existing disclosure gate and explicit-disable policy instead of modifying profile definitions.

Changes

• Register select_tools through the existing disclosure gate in v2 tool activation.
• Add activation tests for the enabled path, closed gate, and explicit policy denial.
• Add a patch changeset for @moonshot-ai/kimi-code.

Testing

• pnpm --filter @moonshot-ai/agent-core-v2 exec vitest run test/agent/toolActivation/toolActivationService.test.ts test/agent/toolSelect/toolSelect.e2e.test.ts
• pnpm --filter @moonshot-ai/agent-core-v2 run typecheck
• pnpm exec oxlint --type-aware packages/agent-core-v2/src/agent/toolActivation/toolActivationService.ts packages/agent-core-v2/test/agent/toolActivation/toolActivationService.test.ts

The focused tests cover registration when the profile omits select_tools, behavior when disclosure is disabled, explicit policy denial, and the existing select-to-MCP execution flow.

Notes for Reviewer

• The exception is intentionally limited to select_tools; all other contributions retain ordinary profile allowlist behavior.
• isToolActiveForDisclosure() preserves global, session, and explicit deny controls.
• The complete package test suite was also attempted locally on Windows; unrelated filesystem, symlink-permission, and path-separator tests fail in that environment.

Fixes #2381

[changeset-bot]

🦋 Changeset detected

Latest commit: b5202a5

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@moonshot-ai/kimi-code	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR