patch up some suggestions

- use pattern matching
- remove typed: false from tools

Author: jcat4

lib/mcp/client/tool.rb

@@ -1,4 +1,3 @@
-# typed: false
 # frozen_string_literal: true
 
 module MCP

test/mcp/client_test.rb

@@ -18,8 +18,7 @@ def test_tools_sends_request_to_transport_and_returns_tools_array
 
       # Only checking for the essential parts of the request
       transport.expects(:send_request).with do |args|
-        args.dig(:request, :method) == "tools/list" &&
-          args.dig(:request, :jsonrpc) == "2.0"
+        args in { request: { method: "tools/list", jsonrpc: "2.0" } }
       end.returns(mock_response).once
 
       client = Client.new(transport: transport)
@@ -40,10 +39,16 @@ def test_call_tool_sends_request_to_transport_and_returns_content
 
       # Only checking for the essential parts of the request
       transport.expects(:send_request).with do |args|
-        args.dig(:request, :method) == "tools/call" &&
-          args.dig(:request, :jsonrpc) == "2.0" &&
-          args.dig(:request, :params, :name) == "tool1" &&
-          args.dig(:request, :params, :arguments) == arguments
+          args in {
+            request: {
+              method: "tools/call",
+              jsonrpc: "2.0",
+              params: {
+                name: "tool1",
+                arguments: arguments,
+              },
+            },
+          }
       end.returns(mock_response).once
 
       client = Client.new(transport: transport)