Description

Summary
It would be great if the SDK supported passing a meta field when defining tools, allowing developers to include additional metadata directly in the tool decorator.

Motivation
Currently, the SDK does not support passing a meta field during tool definition, limiting flexibility for attaching structured metadata such as descriptions, categories, or configuration details.

For example

from mcp.server import fastmcp

mcp = fastmcp.FastMCP(...)

@mcp.tool(meta={...})
def my_tool():
    ...

Comparison
In the latest version of the FastMCP package, this functionality is already supported:

from fastmcp import FastMCP

mcp = FastMCP(...)

@mcp.tool(meta={...})
def my_tool():
    ...

Expected behavior
The server SDK should support the meta argument when defining tools, consistent with the FastMCP implementation.

References

No response