call_tool overloads: collapse to Literal[False] + bool on all three layers

A runtime bool variable now matches the second overload (union return);
literal False and the default still match the first (CallToolResult).
Drops the redundant Literal[True] arm.

Author: maxisbey

src/mcp/client/client.py

@@ -401,7 +401,7 @@ async def call_tool(
         input_responses: InputResponses | None = None,
         request_state: str | None = None,
         meta: RequestParamsMeta | None = None,
-        allow_input_required: Literal[True],
+        allow_input_required: bool,
     ) -> CallToolResult | InputRequiredResult: ...
 
     async def call_tool(

src/mcp/client/session.py

@@ -616,20 +616,6 @@ async def call_tool(
         allow_input_required: Literal[False] = False,
     ) -> types.CallToolResult: ...
 
-    @overload
-    async def call_tool(
-        self,
-        name: str,
-        arguments: dict[str, Any] | None = None,
-        read_timeout_seconds: float | None = None,
-        progress_callback: ProgressFnT | None = None,
-        *,
-        input_responses: types.InputResponses | None = None,
-        request_state: str | None = None,
-        meta: RequestParamsMeta | None = None,
-        allow_input_required: Literal[True],
-    ) -> types.CallToolResult | types.InputRequiredResult: ...
-
     @overload
     async def call_tool(
         self,

src/mcp/client/session_group.py

@@ -215,7 +215,7 @@ async def call_tool(
         input_responses: types.InputResponses | None = None,
         request_state: str | None = None,
         meta: types.RequestParamsMeta | None = None,
-        allow_input_required: Literal[True],
+        allow_input_required: bool,
     ) -> types.CallToolResult | types.InputRequiredResult: ...
 
     async def call_tool(