Dev Tools · 1h ago
AI Agent Tool Calling: MCP, Function Calling, and A2A Explained
AI agent tool calling enables LLMs to interact with external systems via structured JSON payloads. Protocols like MCP standardize tool discovery and execution, while A2A coordinates agent-to-agent delegation. In 2026, the bottleneck shifts from connectivity to tool quality, including context efficiency and multi-user authorization.
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The article correctly identifies that protocol wars are over, but understates the operational complexity of implementing delegated OAuth and audit logs at scale.
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