Hybrid Semantic Tool Discovery for Enterprise MCP Gateway: Architecture and Implementation
Large language model (LLM) agents invoke external tools to retrieve and reason over information beyond pretrained knowledge. The Model Context Protocol (MCP) standardizes how such tools are surfaced, and a proxy MCP server aggregates many backend servers behind a single endpoint providing a secure, governable chokepoint for authentication, policy enforcement, and observability. This architecture creates two compounding challenges: a context-engineering bottleneck where full tool schemas saturate the model context window before any user query, and a tool discoverability barrier where users and agents cannot identify the best tool among 2,000+ indexed tools across 200+ MCP servers. Prompt c...
| Authors | Olympia Saha, Amy Wang, Srinivasan Manoharan |
|---|---|
| Primary category | cs.IR |
| Published | 25 August 2026 |
| Last updated at source | 25 August 2026 |
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