/** Append usage hints to tool descriptions based on tool name keywords. */
export declare function augmentToolDescription(toolName: string, description: string): string;
/**
 * Post-process tool output before returning to the LLM:
 * - Strip embedded page snapshots (token bloat) from non-snapshot tools
 * - Detect overlay/interactable issues on click actions
 * - Detect stale element references
 */
export declare function postProcessToolResult(toolName: string, result: string): string;
export declare function extractTextContent(content?: Array<{
    type: string;
    text?: string;
}>): string;
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