Expose a static method as an MCP tool, callable by AI agents connected to the editor's MCP server. The method name (converted to snake_case) becomes the tool name unless one is given here, and the XML summary becomes the tool description the agent reads. Parameters become the tool's input schema - describe them with [Description]. Tools are invoked on the main thread and can return a Task to be async. Return values get serialized to json for the agent - return a Sandbox.Bitmap to send an image, or an Editor.Mcp.McpResult to compose text and images yourself. Agents find tools through search_tools and run them through call_tool - so the name and description are what make a tool discoverable.