---
title: "Discussion on \"Your LLM Doesn't Need to See the Token Either\n\n\" | Hashnode"
description: "Discussion on \"Your LLM Doesn't Need to See the Token Either\n\n\". Learn how MCP tool interceptors let you inject auth tokens, session IDs, metadata into tool calls without exposing them to your LLM or tool schemas."
url: "https://hashnode.com/posts/mcp-tool-call-interceptors/6a492fdad36b2f4f9f6bdeae"
---

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# [Your LLM Doesn't Need to See the Token Either](https://tanisha-soni.hashnode.dev/mcp-tool-call-interceptors?utm_source=hashnode&utm_medium=feed)

Learn how MCP tool interceptors let you inject auth tokens, session IDs, metadata into tool calls without exposing them to your LLM or tool schemas.

Jul 4 · 4 min read · tanisha-soni.hashnode.dev  
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-   [#model-context-protocol](https://hashnode.com/tag/model-context-protocol)
-   [#langgraph](https://hashnode.com/tag/langgraph)
-   [#ai](https://hashnode.com/tag/ai)
-   [#tool-calling](https://hashnode.com/tag/tool-calling)

## Written by

[Tanisha Soni](https://hashnode.com/@tanisha-soni)

@tanisha-soni · Mumbai, India

  
[View profile](https://hashnode.com/@tanisha-soni)

AI/Backend Engineer building agentic systems with LangChain & MCP

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