Add comments to the MCP example (#2507)

examples/mcp_example.py

@@ -2,22 +2,33 @@ from pprint import pprint
 
 from letta_client import Letta
 
+# Connect to Letta server
 client = Letta(base_url="http://localhost:8283")
 
+# Use the "everything" mcp server:
+# https://github.com/modelcontextprotocol/servers/tree/main/src/everything
 mcp_server_name = "everything"
 mcp_tool_name = "echo"
 
+# List all McpTool belonging to the "everything" mcp server.
 mcp_tools = client.tools.list_mcp_tools_by_server(
     mcp_server_name=mcp_server_name,
 )
+
+# We can see that "echo" is one of the tools, but it's not
+# a letta tool that can be added to a client (it has no tool id).
 for tool in mcp_tools:
     pprint(tool)
 
+# Create a Tool (with a tool id) using the server and tool names.
 mcp_tool = client.tools.add_mcp_tool(
     mcp_server_name=mcp_server_name,
     mcp_tool_name=mcp_tool_name
 )
 
+# Create an agent with the tool, using tool.id -- note that
+# this is the ONLY tool in the agent, you typically want to
+# also include the default tools.
 agent = client.agents.create(
     memory_blocks=[
         {
@@ -31,6 +42,7 @@ agent = client.agents.create(
 )
 print(f"Created agent id {agent.id}")
 
+# Ask the agent to call the tool.
 response = client.agents.messages.create(
     agent_id=agent.id,
     messages=[