Simplify `src/mcp/shared/metadata_utils.py::get_display_name` logic.

Lies src/mcp/shared/metadata_utils.py::get_display_name und vergleiche dessen aktuelle Priorität mit der vorgeschlagenen Anpassung. Die Arbeit ist abgeschlossen, wenn title bei jedem aufgeführten Objekt zuerst geprüft wird, Tool annotations.title der mittlere Fallback bleibt und obj.name der letzte Fallback bleibt.

Current Code Logic

As of now, src/mcp/shared/metadata_utils.py::get_display_name works like this:

def get_display_name(obj: Tool | Resource | Prompt | ResourceTemplate | Implementation) -> str:
    """Get the display name for an MCP object with proper precedence.

    This is a client-side utility function designed to help MCP clients display
    human-readable names in their user interfaces. When servers provide a 'title'
    field, it should be preferred over the programmatic 'name' field for display.

    For tools: title > annotations.title > name
    For other objects: title > name

    Example:
        ```python
        # In a client displaying available tools
        tools = await session.list_tools()
        for tool in tools.tools:
            display_name = get_display_name(tool)
            print(f"Available tool: {display_name}")
        ```

    Args:
        obj: An MCP object with name and optional title fields

    Returns:
        The display name to use for UI presentation
    """
    if isinstance(obj, Tool):
        # Tools have special precedence: title > annotations.title > name
        if hasattr(obj, "title") and obj.title is not None:
            return obj.title
        if obj.annotations and hasattr(obj.annotations, "title") and obj.annotations.title is not None:
            return obj.annotations.title
        return obj.name
    else:
        # All other objects: title > name
        if hasattr(obj, "title") and obj.title is not None:
            return obj.title
        return obj.name

However, code logic here can simplify, since title-first precedence applies to every object type.

Only Tool-specific not None annotations.title fallback needs a special middle branch.

Proposed Logical Adjustments

# All objects have title-first precedence, regardless of being a Tool or not.
if hasattr(obj, "title") and obj.title is not None:
    return obj.title

# Special middle branch for Tool-specific not None `annotations.title`.
if isinstance(obj, Tool) and obj.annotations:
    if hasattr(obj.annotations, "title") and obj.annotations.title is not None:
        return obj.annotations.title

# All other objects: name as last fallback.
return obj.name