mcp-tool-discovery-when-an-mcp-host-connects-to-many-servers-with-hun-a8fb67c5

THEN Implement progressive tool discovery: defer injection of tool definitions into the model's context. Provide a lightweight search_tools meta-tool for the model to discover tools on demand. Load full definitions only when needed. Implement a threshold (e.g., 1-5% of context window) to switch from upfront loading to progressive discovery. Use a three-layer approach: Catalog (search), Inspect (get details), Execute (call tool). Optionally support dynamic server management by connecting to servers only when needed.

// The model calls a lightweight search tool
search_tools({ query: "update salesforce record" })
// Returns concise matches: names and one-line descriptions only
→ [
    { name: "salesforce_updateRecord", description: "Update fields on a Salesforce object" },
    { name: "salesforce_upsertRecord", description: "Insert or update based on external ID" }
  ]

// The model inspects only the tool it needs
get_tool_details({ name: "salesforce_updateRecord" });