Fixed crash when using mcp.tool decorator (#1297)

Author: droserasprout

CHANGELOG.md

@@ -11,6 +11,7 @@ Releases prior to 7.0 has been removed from this file to declutter search result
 ### Fixed
 
 - demos: Use Etherscan v2 API endpoints in EVM templates.
+- mcp: Fixed crash when using `mcp.tool` decorator.
 
 ### Changed
 

src/dipdup/mcp.py

@@ -1,10 +1,9 @@
-from __future__ import annotations
-
+# NOTE: Careful there, PEP 563 annotations break `mcp` library!
+# from __future__ import annotations
 import logging
 import traceback
 from collections.abc import Awaitable
 from collections.abc import Callable
-from typing import TYPE_CHECKING
 from typing import Any
 from typing import TypeVar
 from typing import cast
@@ -21,13 +20,11 @@
 _logger = logging.getLogger(__name__)
 
 
+from collections.abc import Iterable
+
 import mcp.server
 import mcp.types as types
 
-if TYPE_CHECKING:
-    from collections.abc import Iterable
-
-
 # NOTE: Global context management
 _ctx: McpContext | None = None