/**
 * ActivateTool — meta-capability that lets the agent pull on-demand tools
 * into the active toolset per session.
 *
 * Pattern borrowed from OpenBB MCP server's per-session tool visibility:
 * a weak model confronted with 25+ tool definitions starts inventing names
 * or emits role-play "[TOOLCALL]" fragments. Register only the core file/
 * shell tools by default and let the model explicitly opt in to the rest.
 *
 * Contract:
 *   - `ActivateTool()` with no args → lists every inactive tool with a
 *     one-line description so the model knows what's available.
 *   - `ActivateTool({ names: ["ExaSearch", "ExaReadUrls"] })` → adds the
 *     named tools to the session's active set; subsequent turns include
 *     their full schemas. Returns a concise confirmation.
 *
 * The factory captures the shared `activeTools` Set that the loop filters
 * against and the full `allTools` map used for name resolution. Both live
 * in the session — activation is not durable across restarts on purpose,
 * since the model can always re-activate on the next turn if it needs to.
 */
import type { CapabilityHandler } from '../agent/types.js';
export interface ActivateToolDeps {
    /** Mutable set of tool names currently visible to the model. */
    activeTools: Set<string>;
    /** Map of every registered capability, keyed by name. */
    allTools: Map<string, CapabilityHandler>;
}
export declare function createActivateToolCapability(deps: ActivateToolDeps): CapabilityHandler;