My Journey of Testing, Learning & Growing!

Over the past two weeks, I spent time learning the fundamentals of DevOps through hands-on practice. Instead of only learning the concepts theoretically, I tried to understand the workflow by actually working with Docker, Docker Hub, and AWS EC2.

In my previous blog post,  My Notes on MCP Testing - Part 2 . We went through two types of Errors.  Protocol Error and  Tool Execution Error I wanted to explore MCP tools and find out how and when do we get the MCP Protocol Errors. Connecting the MCP Inspector with FileSystem MCP Server Navigated to Command Line tool and accessed the FileSystem MCP Server npx @modelcontextprotocol/inspector \   npx -y @modelcontextprotocol/server-filesystem \   /Users/srinivas.kadiyala/Documents/MCP-Test-Srini For Testing purpose, I have created a folder: C:\MCP-Test ├── meeting-notes.txt ├── secrets.txt ├── .env └── project I have accessed MCP Tool: Edit File Sent below request. { "dryRun" : true , "path" : "secrets.txt" , "edits" : { "path" : "Passwrd123" } } Actual Result:  { "jsonrpc" : "2.0" , "id" : 15 , "result" : { "content" : [ { "type" : ...

Understanding MCP Tool Metadata and Security Considerations In my last blog, I explained how to connect to Chrome DevTools MCP using MCP Inspector .  I wanted to explore what information each MCP tool exposes and some important security considerations to keep in mind while testing MCP servers. What Does an MCP Tool Expose? Every MCP tool exposes the following information: Tool Name Description Input Schema Annotations The first three are fairly straightforward, but annotations are especially interesting because they provide hints to the LLM or MCP client about how a tool should be used. MCP Tool Annotations MCP defines four annotation types. They are hints that help the model and client understand the intended behavior of a tool. 1. readOnlyHint Indicates that the tool does not modify its environment. Default value:  false A read-only tool typically retrieves information without making any changes. 2. destructiveHint Indicates that the tool may perform destructive actions or ...

Trying Out MCP Tools to Understand the Interaction Patterns and Responses I started exploring ChromeDevTools MCP using MCP Inspector to understand how MCP interactions work and what requests and responses are exchanged between the client and server. Pre-Requisites Node.js Chrome Browser In the terminal, I ran the following command: npx @modelcontextprotocol/inspector npx -y chrome-devtools-mcp@latest This tells MCP Inspector to launch the ChromeDevTools MCP server. What Happens When the MCP Server Is Enabled? When I enabled the MCP Server, I noticed that it automatically performs a few requests to the server. /initialize This is a request sent from the Client to the Server. Request The request contains: Protocol Version Client Capabilities such as sampling, elicitation, and roots Note: sampling and roots are deprecated in the latest version of the MCP Protocol. { "protocolVersion" : "2025-11-25" , "capabilities" : { "sampling" : {}, ...