Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

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## Why are these changes needed?

MCP Python-sdk has started to support a new transport protocol named
`Streamble HTTP` since
[v1.8.0](https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.8.0)
last month. I heard it supersedes the SSE transport. Therefore, AutoGen
have to support it as soon as possible.

## Related issue number

https://github.com/microsoft/autogen/discussions/6517

## Checks

- [x] I've included any doc changes needed for
<https://microsoft.github.io/autogen/>. See
<https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md> to
build and test documentation locally.
- [x] I've added tests (if relevant) corresponding to the changes
introduced in this PR.
- [x] I've made sure all auto checks have passed.

---------

Co-authored-by: Victor Dibia <victordibia@microsoft.com>
Co-authored-by: Victor Dibia <victor.dibia@gmail.com>

…ized properly

## Why are these changes needed?
The exceptions thrown by MCP server tools weren't being serialized
properly - the user would see `[{}, {}, ... {}]` instead of an actual
error/exception message.

## Related issue number

Fixes #6481 

## Checks

- [ ] I've included any doc changes needed for
<https://microsoft.github.io/autogen/>. See
<https://github.com/microsoft/autogen/blob/main/CONTRIBUTING.md> to
build and test documentation locally.
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introduced in this PR.
- [x] I've made sure all auto checks have passed.

---------

Signed-off-by: Peter Jausovec <peter.jausovec@solo.io>
Co-authored-by: Victor Dibia <victordibia@microsoft.com>
Co-authored-by: Victor Dibia <victor.dibia@gmail.com>

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## Why are these changes needed?
As-is: Deleting `McpWorkbench` does not close the `McpSession`.  
To-be: Deleting `McpWorkbench` now properly closes the `McpSession`.

<!-- Please give a short summary of the change and the problem this
solves. -->

## Related issue number

<!-- For example: "Closes #1234" -->

## Checks

- [ ] I've included any doc changes needed for
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build and test documentation locally.
- [x] I've added tests (if relevant) corresponding to the changes
introduced in this PR.
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## Why are these changes needed?
Our McpWorkbench required properties however mongodb-lens's some tools
do not has it. I will fix it from when properties is None, -> {}
Our McpWorkbench now does not have stop routine with without async with
McpWorkbench(params) as workbench: and lazy init. So, I will adding def
__del__: pass just insert that, It could show error.

## Related issue number

Closes #6425

## Checks

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build and test documentation locally.
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introduced in this PR.
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## Why are these changes needed?
- Add return_value_as_string for formating result from MCP tool

## Related issue number
- Opened Issue on #6368 

## Checks
- [x] I've included any doc changes needed for
<https://microsoft.github.io/autogen/>. See
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introduced in this PR.
- [x] I've made sure all auto checks have passed.

---------

Co-authored-by: Eric Zhu <ekzhu@users.noreply.github.com>

This PR introduces `WorkBench`.

A workbench provides a group of tools that share the same resource and
state. For example, `McpWorkbench` provides the underlying tools on the
MCP server. A workbench allows tools to be managed together and abstract
away the lifecycle of individual tools under a single entity. This makes
it possible to create agents with stateful tools from serializable
configuration (component configs), and it also supports dynamic tools:
tools change after each execution.

Here is how a workbench may be used with AssistantAgent (not included in
this PR):

```python
workbench = McpWorkbench(server_params)
agent = AssistantAgent("assistant", tools=workbench)
result = await agent.run(task="do task...")
```


TODOs:
1. In a subsequent PR, update `AssistantAgent` to use workbench as an
alternative in the `tools` parameter. Use `StaticWorkbench` to manage
individual tools.
2. In another PR, add documentation on workbench.

---------

Co-authored-by: EeS <chiyoung.song@motov.co.kr>
Co-authored-by: Minh Đăng <74671798+perfogic@users.noreply.github.com>

Resolves #6232, #6198

This PR introduces an optional parameter `session` to `mcp_server_tools`
to support reuse of the same session.

```python
import asyncio

from autogen_agentchat.agents import AssistantAgent
from autogen_agentchat.conditions import TextMentionTermination
from autogen_agentchat.teams import RoundRobinGroupChat
from autogen_agentchat.ui import Console
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_ext.tools.mcp import StdioServerParams, create_mcp_server_session, mcp_server_tools


async def main() -> None:
    model_client = OpenAIChatCompletionClient(model="gpt-4o", parallel_tool_calls=False)  # type: ignore
    params = StdioServerParams(
        command="npx",
        args=["@playwright/mcp@latest"],
        read_timeout_seconds=60,
    )
    async with create_mcp_server_session(params) as session:
        await session.initialize()
        tools = await mcp_server_tools(server_params=params, session=session)
        print(f"Tools: {[tool.name for tool in tools]}")

        agent = AssistantAgent(
            name="Assistant",
            model_client=model_client,
            tools=tools,  # type: ignore
        )

        termination = TextMentionTermination("TERMINATE")
        team = RoundRobinGroupChat([agent], termination_condition=termination)
        await Console(
            team.run_stream(
                task="Go to https://ekzhu.com/, visit the first link in the page, then tell me about the linked page."
            )
        )


asyncio.run(main())
``` 

Based on discussion in this thread: #6284, we will consider
serialization and deserialization of MCP server tools when used in this
manner in a separate issue.

This PR also replaces the `json_schema_to_pydantic` dependency with
built-in utils.

Resolves #6096

Additionally: make sure MCP errors are formatted correctly, added unit
tests for mcp servers and upgrade mcp version.

Resolves #5745

Also made sure to log LLMCallEvent from all builtin model clients, and
added unit test for coverage.

---------

Co-authored-by: Ryan Sweet <rysweet@microsoft.com>
Co-authored-by: Victor Dibia <victordibia@microsoft.com>

Co-authored-by: Eric Zhu <ekzhu@users.noreply.github.com>