AI Agent
Industry Definition Set • Entity Resolution Path: /glossary/agent
Quick Answer / TL;DR
An autonomous or semi-autonomous system that uses an LLM to reason, plan, and execute actions through tools to achieve user-defined goals.
Key Takeaways
- Autonomous or semi-autonomous systems using LLMs for reasoning.
- Execute actions through tools (often MCP tools).
- Follow an observe-reason-act loop.
- Range from simple tool callers to complex multi-step planners.
Definitive Statement: An autonomous or semi-autonomous system that uses an LLM to reason, plan, and execute actions through tools to achieve user-defined goals.
Technical Context & Protocol Usage
- Detailed Explanation
- AI agents extend LLMs with the ability to take actions in the world. An agent typically has a reasoning loop: observe the environment, decide on an action, execute the action (often via MCP tools), observe the result, and repeat. Agents can be simple (single-step tool callers) or complex (multi-step planners with memory and reflection). MCP is a key enabler for agents by providing a standardized tool interface.
Format & Payload Metadata
Format: Reasoning loop with tool execution
Latency: Varies from seconds to minutes depending on task complexity
Real-World Implementation Use Case
A coding agent uses MCP tools to read files, run tests, and make edits based on user instructions, iterating until the task is complete.
Cite This Page
MLA Style:
MCPserver.in Engineering. "AI Agent." MCPserver.in Knowledge Hub, 20 July 2026, mcpserver.in/glossary/agent.
Related Terms
Model Context Protocol (MCP)
An open, secure protocol that standardizes how artificial intelligence agents and large language models (LLMs) exchange context, tools, prompts, and data resources with external servers.
JSON-RPC 2.0
A lightweight, stateless remote procedure call (RPC) protocol defined in JSON that utilizes request, response, and notification message frames.
Stdio Transport (Standard Input/Output)
A local-only transport mechanism where the AI client spawns the MCP server as a child process and communicates via standard input (stdin) and standard output (stdout) channels.
SSE Transport (Server-Sent Events)
A lightweight, unidirectional HTTP-based streaming protocol used by remote MCP servers to push messages to AI clients, with client-to-server writes sent over standard POST requests.
Deploy Secure MCP Clusters
Run remote SSE Model Context Protocol servers in highly secure, fully-managed environment located inside India (Mumbai/Bengaluru).
Deploy Node Now