🟡 Changes recommended

Four existing Anthropic tests retain assertions that will fail under the new tool-scoping behavior.

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Scopes ChatClientAgent tools per agent run, preventing duplication and leakage through shared clients.

Changes:

• Removes tool assignment to shared FunctionInvokingChatClient.AdditionalTools.
• Adds coverage for tool isolation between agents.

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Balanced

MAF Automated Review — Iteration 1

Result: Findings reported
Scope: full PR (1 commit(s)): eb91ee35bbd9
Model: gpt-5.6-sol-fast

Overview

The PR removes agent-specific tools from shared FunctionInvokingChatClient state and relies on the existing per-run ChatOptions.Tools merge path instead. Constructor cloning, request-level merging, streaming and non-streaming forwarding, and the new shared-client regression test support that runtime contract. However, four tests in the active Anthropic unit-test project still require tools in AdditionalTools, so the current change deterministically breaks that suite.

Reviewed the supplied pull-request change set across correctness, security/reliability, architecture, and failure behavior.
1 verified finding remained after source verification (1 medium) across 1 file. Details are attached to the affected lines below.

Affected areas: dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientExtensions.cs