import type { Tool } from './tool-types.js';
export type PreToolHookContext = {
    toolName: string;
    input: Record<string, unknown>;
    sessionKey: string;
};
export type PreToolHookResult = {
    ok: true;
    input: Record<string, unknown>;
} | {
    ok: false;
    message: string;
};
export type PreToolHook = (ctx: PreToolHookContext) => Promise<PreToolHookResult>;
export declare function registerPreToolHook(hook: PreToolHook): () => void;
export declare function clearPreToolHooksForTests(): void;
export declare function validateToolInputObject(tool: Tool, input: unknown): {
    ok: true;
    value: Record<string, unknown>;
} | {
    ok: false;
    message: string;
};
export declare function runPreToolHookChain(toolName: string, input: Record<string, unknown>, sessionKey: string): Promise<PreToolHookResult>;
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