[Agents] Fix Markdown link for MCP (#20421)

Author: KianNH

src/content/docs/agents/concepts/tools.mdx

@@ -29,7 +29,7 @@ The most common type of tools are those that wrap external APIs. These tools han
 
 #### Model Context Protocol (MCP)
 
-The (Model Context Protocol)[https://modelcontextprotocol.io/introduction] provides a standardized way to define and interact with tools. Think of it as an abstraction on top of APIs designed for LLMs to interact with external resources. MCP defines a consistent interface for:
+The [Model Context Protocol](https://modelcontextprotocol.io/introduction) provides a standardized way to define and interact with tools. Think of it as an abstraction on top of APIs designed for LLMs to interact with external resources. MCP defines a consistent interface for:
 
 - **Tool Discovery**: Systems can dynamically discover available tools
 - **Parameter Validation**: Tools specify their input requirements using JSON Schema