Doc refactor (#6300)

Co-authored-by: jacoblee93 <jacoblee93@gmail.com>
Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>

docs/snippets/modules/agents/tools/get_started.mdx

@@ -0,0 +1,15 @@
+```python
+from langchain.agents import load_tools
+tool_names = [...]
+tools = load_tools(tool_names)
+```
+
+Some tools (e.g. chains, agents) may require a base LLM to use to initialize them.
+In that case, you can pass in an LLM as well:
+
+```python
+from langchain.agents import load_tools
+tool_names = [...]
+llm = ...
+tools = load_tools(tool_names, llm=llm)
+```