📌 What is MCP? The USB-C for AI Content
Lately, there's a lot of chatter around MCP, its utility & confusion around fully understanding the potential & how it evolves from hereon
Having spent a lot of time thinking on this topic, here's a sincere attempt at distilling my thoughts on the topic👇
MCP aims to simplify how LLMs access & utilize external information, much like how USB-C provided a universal standard for data & power
It's an open protocol standardizing the way apps provide context to LLMs/AI systems
- Open Protocol: Designed to be a community-driven standard fostering interoperability & avoiding vendor lock-in
- Context: LLMs are context unaware instruction followers (h/t
@NirantK). For them to be truly useful in real-world applications, they need to interact w/ current, relevant & often private data & this context could range from files on your local PC & data inside databases to info from APIs & content from web pages
📌So what is the big deal? Why is there so much interest?
The real innovation & significance here lies in data isolation
- Universal standard for data connection: Currently if you want to connect an LLM to an external data source, you often have to build a custom integration - time-consuming, complex & unscalable. MCP provides a single, unified protocol to connect AI systems with diverse data sources. Instead of building fragmented, point-to-point integrations, you build against a standard.
- Simplified development: Imagine you want to build an AI assistant that summarizes docs from Google Drive, answer questions from a Postgres database & trigger actions in Slack. W/o MCP, you'd likely need to write custom code for each of these integrations. With MCP, you can potentially use pre-built "MCP servers" (connectors) for these systems or easily build your own knowing you're adhering to a common standard. This drastically simplifies development making it easier to scale AI apps across different data environments
- Improves the quality & relevance of AI responses: By giving LLMs standardized access to more relevant context, MCP directly leads to better, more accurate & more useful AI responses
- Open & community driven: Encourages collaboration, innovation & a wider ecosystem of tools & connectors
📌How did people do this before MCP? Why devise a new way?
It's a different way of building AI applications & how they interact w/ data
- Replaces Custom Integration Code: Instead of writing bespoke connectors for every data source, developers can leverage or build MCP servers reducing boilerplate code & dev time
- Enhances existing tools: Products like
@windsurf_ai,
@cursor_ai, etc can integrate MCP to provide AI agents w/ better context about coding tasks. This could mean AI assistants that are more aware of your project structure, codebase & related documentation.
- Complements Function Calling/Tool Use: Many LLMs already have "function calling" capabilities, allowing them to interact with external tools. MCP can standardize how these tools are connected & how data is exchanged, making tool use more robust & easier to manage across different systems.
- Enables Agentic Systems: By providing a standardized way for agents to access & share context across different tools & datasets, MCP enables AI systems that can perform more complex, multi-step tasks & maintain context as they move b/w different environments.
How does this evolve from hereon?
1/ Auth & Permissioning in MCP:
Current Problem
MCP is designed to connect LLMs to diverse data sources, many of which will be sensitive or require specific permissions. We can't just have open access to everything. We need robust mechanisms to ensure:
- Identity Verification: Knowing who is accessing data (user, application, agent)
- Authorization: Controlling what they are allowed to access & do
- Secure Data Handling: Protecting data in transit & at rest within the MCP ecosystem
Possible solution ideas (tech)
- MCP identity layer: Define a standardized way for MCP clients (applications, agents) and MCP servers (data source connectors) to authenticate each other. This could build upon existing standards like OAuth 2.0 or similar, adapted for the MCP context.
- Fine-Grained Permission Models: MCP needs to support granular permissioning at the data source level. This means MCP servers would need to translate MCP authorization requests into the native permission models of the underlying data systems (database roles, file system ACLs, API keys).
- Policy Enforcement Points: MCP infrastructure would need policy enforcement points (likely within MCP servers) to evaluate access requests based on identity & permissions before granting data access.
- End-to-End Encryption: Mandatory encryption for data in transit within the MCP network to protect confidentiality. Potentially support options for data-at-rest encryption within MCP servers as well.
- Audit Logging: Comprehensive audit logs of all data access requests & permission decisions for security monitoring & compliance.
Possible productized ideas
- Simplified credential management: Maybe a central "MCP Credential Wallet" for users to manage their data source connections & permissions.
- Visual Permissioning Interfaces: For devs & admins, GUIs to easily define & manage permissions for different users & applications accessing data via MCP.
2/ Routing & Context precision in MCP:
Current Problem
When an AI agent makes an MCP request, how does it know which MCP server to query? And how do we ensure it gets the most relevant context, not just any context? We'd need mechanisms for:
- Service Discovery: MCP clients need to discover available MCP servers that can provide the context they need ("find me an MCP server that can access Google Drive documents")
- Contextual Routing: Directing requests to the right MCP server based on the type of data being requested & potentially even the content of the query
- Precision & Relevance: Ensuring that the context returned by MCP servers is highly relevant to the AI agent's query, minimizing noise & maximizing signal
Possible solution ideas (tech)
- MCP Registry/Directory: A central registry where MCP servers can register their capabilities (data sources they connect to, types of data they can provide etc). MCP clients can query this registry to discover suitable servers.
- Semantic Routing: Beyond simple keyword-based routing to semantic understanding of context requests. Using metadata & potentially even lightweight ML models to route requests to servers that are semantically aligned with the query's intent.
- Contextual Metadata Standards: Define standardized metadata schemas for describing the data provided by MCP servers. This metadata can be used for both service discovery & more precise context retrieval. Thinking of it as "tagging" data sources w/ semantic labels.
- Query Refinement & Filtering: MCP clients could provide more structured or refined queries to MCP servers, allowing servers to return more precise context. MCP servers could also offer filtering & ranking mechanisms to prioritize the most relevant context.
- Advanced querying: In more complex scenarios, MCP could support federated queries where a single client request is routed to multiple MCP servers & the results are aggregated & ranked for relevance.
Possible productized ideas
- Intelligent Context Suggestion: For developers, tools that help them discover & select the right MCP servers & define precise context queries. Maybe an "MCP Context Explorer" GUI.
- "Smart Connectors" w/ auto-routing: Pre-built connectors that automatically handle service discovery & routing, abstracting away the complexity for less technical users.
- Relevance Feedback Loops: Mechanisms for AI agents (+ users) to provide feedback on the relevance of context received, allowing the routing & precision mechanisms to learn & improve over time.
These are the things I could come up w/ & I'm sure I'd have missed a lot of things here - please do share more ideas & feedback🙏