/**
 * Generate minimal valid JSON from a JSON Schema inputSchema.
 * Used to construct arguments for safe tool invocation during health checks.
 */
export declare function stubFromSchema(schema: Record<string, unknown> | undefined): Record<string, unknown>;
/**
 * Returns true if a tool is safe to invoke during health checks:
 * - Has no required parameters, OR
 * - Has readOnlyHint annotation set to true
 */
export declare function isSafeToInvoke(tool: {
    inputSchema?: Record<string, unknown>;
    annotations?: Record<string, unknown>;
}): boolean;