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What is Model Context Protocol (MCP)?

The Model Context Protocol (MCP) is Anthropic’s open standard for agent-to-tool communication, defining how AI agents discover available tools, invoke them, and exchange data with the underlying services. MCP adoption has grown faster than its security maturity; a 2026 audit found that 53 percent of public MCP servers ship with static API keys and no per-call authorization.

Why it matters in 2026

MCP turned the agent-to-tool integration problem into a single standard. Before MCP, every agent platform had its own tool-calling format. After MCP, any MCP-compliant agent can call any MCP-compliant tool. The standard moved adoption from custom integrations to a published spec in less than a year.

The security gap is consistent with how fast standards are written. MCP defines the wire format but not the authorization model. Most public MCP servers rely on long-lived static credentials, with no per-request scope or audit trail. Enterprises deploying MCP servers in production typically add an authorization gateway in front. Vaikora’s vaikora-guard-mcp server is one example of this pattern.

How MCP relates to adjacent terms

MCP is agent-to-tool. A2A is agent-to-agent. Agentic AI systems use MCP to call their tools and A2A to delegate to other agents. MCP is published by Anthropic but the spec is open and adoption extends beyond Anthropic clients.

Examples

A Claude Desktop user connects an MCP server that exposes Snowflake query capabilities. The user asks a natural-language question; the agent calls the MCP server, the server runs the SQL, and the result returns to the conversation. A second example: an internal coding agent uses MCP to access a private code-search server, with vaikora-guard-mcp sitting in front to enforce per-request scope based on the user’s role.

FAQ

Who maintains MCP?

Anthropic published the spec and maintains the reference implementation. The protocol is open; servers and clients exist across vendors and open-source projects.

What is the security model in MCP today?

MCP defines the wire format but not the authorization layer. Most servers rely on static keys. Production deployments typically wrap MCP with an authorization gateway like vaikora-guard-mcp.

Can I write my own MCP server?

Yes. The spec is open and Anthropic publishes SDKs in multiple languages. Most internal MCP server adoption happens this way: a team wraps an internal API in an MCP server so their AI agents can call it.

Where does Vaikora fit?

vaikora-guard-mcp is an MCP server that sits in front of other MCP servers (Snowflake, GitHub, Xero, internal tools) and enforces policy on every tool call. It is the MCP-shaped version of the Vaikora gateway.