Agents
Idempotency
An idempotent operation produces the same result no matter how many times it runs.
Calling it twice does nothing that a single call had not already done.
For a tool that writes, sends, or deletes, idempotency is what makes a retry safe.
It is usually enforced with a unique key passed on every retry of the same call.
Without it, a timeout followed by an automatic retry can execute the same mutation twice.
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Agent (Agentic AI) An agent is an LLM given a loop, memory, and tools it can call. Model Context Protocol (MCP) MCP is an open standard for connecting LLM applications to tools and data sources. Context Engineering Context engineering decides what occupies a model's context window at every step, and in what order. Structured Output Structured output constrains a model's response to a defined schema instead of free-form prose.